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Hub Transport Back Pressure Causing Tarpitting

August 2, 2016, 2:50 pm
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Hello All,

    I am seeing some log line in my SMTP Receive Connector logs stating that a message was tarpitted for X seconds due to back pressure. I have seen these types of issues before; however, they always were accompanied by an event log entry stating why the back pressure value was elevated to "medium" or "high". In this instance I'm not seeing any events in the event log regarding back pressure. I have searched for all known back pressure event IDs (15004 - 15007) and am unable to locate any. My EdgeTransport.exe.config is pretty much baseline as well. I do have the tarpit interval on the receive connector in question set to 00:00:00. Any assistance with troubleshooting this would be greatly appreciated.

Thanks,
Dana Garcia

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Impact when you kill bpbkar32.exe process on an Exchange server

July 31, 2016, 7:03 pm
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Hi, Guys.

Need your assistance on this.

What's the impact if I kill bpbkar32.exe process on an Exchange server? Would it cause the server in unresponsive state? Please advise.

Thank you.

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Outlook 2016 Fails Authentication with local login account before trying account email credentials

July 29, 2016, 1:10 pm
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I am running Outlook 2016 on Windows 10.  I am connecting to an on-premise Exchange 2010 with my employer.  I am told that my client is failing authentication every time I open Outlook several times (10 to 30 times) by sending the locally logged on credentials to Exchange.  Then,  the authentication switches to the account credentials identified in the Exchange email account setup and everything is fine.  Why does Outlook send the local computer login credentials to Exchange before trying the credentials set for the particular mail account?

I have completely removed all stored credentials in credential manager and removed the email account.  I installed the email account as the only account on the computer.  Same thing happens.  I have tried "prompt for credentials" on the account and have tried both "save password for this account" checked and unchecked.  It makes no difference.  Outlook still sends the local login credentials first.  

I have also tried logging into the computer with a Microsoft account and with a local machine account.  Same results either way.

Has anyone witnessed this behavior?

Fly Navy, Scott MCSE CEH CISSP

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Exchange 2010 in a resource domain in a single forest

August 2, 2016, 11:35 am
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Hi:

I'm looking at an Exchange 2010 install with a root domain, user child domain, resource child domain (where servers are located), and few other child domains operated by other company entities.  Single forest, one exchange organization.  All DCs are 2008r2. Exchange is also installed on 2008 r2.

The resource child domain contains a multi-node DAG with multiple copies of databases.  I've been testing the same configuration in a test lab to determine the dependency list of exchange components in various scenarios.  I've noted two so far, and wonder how to best prepare for the "day" when things break.

One is the restart sequence for active directory.  While you may have multiple DNS servers specified, it seems that Windows has problems using the second or third DNS entry  (at least quickly ) to get a DC up and running.  Is there a recommended way to configure DNS settings for DCs in a child domain.  Should they point to themselves first, root domain second...all point at root domain, etc.   

One of the tests I performed was to replicate the user account child domain DNS to all DCs in the forest.  Even in the absence of the root domain controllers being up, machines seemed sluggish to resolve names or servers in the user account child domain, despite having a copy of the zone.  This seemed to be resolved once the Root DCs/DNS were started.

Along the same lines of a test, trying to get Exchange up fully without the root DCs seems to be problematic. Scenario...root DCs are down, but both the child user account domain and resource domains DCs are all functional. Even with the child domain user acct zone replicated to all DCs.  Unless the root zone DC was up..System attendant service on the Exchange DAG nodes would not start. So despite knowing where the child user domain was, it seemed unable to resolve things properly until the root was configured. Any suggestions for Exchange configuration tweaks in a resource child domain and User child domain??

What is the MS Exchange System Attendant service looking for on startup?

thanks

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Exchange server 2010 , failure to send an AutodiscoverPOST request, Outlook 2016 fails to Autodiscover on internet only

April 26, 2016, 4:11 am
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We have an exchange server 2010 SP3, serving Outlook 2010,2013 and 2016 clients. When the server was set up for auto-discover one test in the MS Outlook connectivity  kept failing but the overall test said that auto-discovery was working. The test that is failing is

Image

We recently purchased MS Office 2016 for two clients. These clients connect locally using Auto-discover, but do not connect using Auto-discover over the internet. We use a split DNS where by the internal network is .local and the external DNS is hosted somewhere else. I have tried altering the DNS settings as suggested in other articles. But the result was no email from the internet. Local email only. So if the above issue is stopping Outlook 2016 from functioning outside the local network. How do I fix Exchange 2010 to get Outlook 2016 to work from the internet? I may add that Outlook 2010 and 2013 clients work with auto-discovery both inside the network and from the internet.

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Problem with certificates after exchange 2013 cu9 installation

July 13, 2015, 6:04 am
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We have 2 exchange 2013 Mailbox/CAS servers as DAG members plus witness. After upgrading first one from cu 5 to cu 9 everythink work fine.

After Upgrading 2nd node we're having problems with certificates tab i ECP. When we try to view first server cert's everythink is ok.

When we try to view 2nd server cert's we get an error :

The Exchange Certificate operation has failed with an exception on server <server_name>. The error message is: Unknown error (0xc0000005 

same thing from one server to another via exchange managment shell.

When running get-exchangecertificate on local server to local server response is correct

Any Ideas what may cause the problem ??


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Cannot open your default email folders. Outlook cannot start because a data file to send and receive messages cannot be found

January 23, 2014, 5:56 am
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Hi,

I'm running Microsoft outlook 2010 on Windows 7 and i can't get outlook to open because when i open it, halfway through loading it, it says :

"Cannot open your default email folders. Outlook cannot start because a data file to send and receive messages cannot be found. Check your settings in this Microsoft outlook profile. In Microsoft Windows, click the start button, and then click control panel. Click user accounts and then click and then click mail. Click show profiles, select this profile, and then click properties. 

I've searched online to try and solve this and the common answer it so uncheck the compatibility box in properties, but mine is already unchecked. I've tried checking it and unchecking it and it still doesn't work. 

There have been other answers but my IT knowledge is extremely limited  and i don't want to risk making things worse. If anybody has an answer I'd be extremely grateful to see it! I'm hoping this'll be quite simple so that i can do this myself!

Thanks

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Procedure on how to configure Outlook Anywhere in Exchange 2010 servers

July 30, 2016, 1:58 am
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Hi, Guys.

Need your assistance on this.

Could you please let me know the process/procedure on how to configure Outlook Anywhere in Exchange 2010 servers? Would there be any other requirements? Please advise.

Thank you.

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How to find the Out Of Office (OOF) enable and disable logs history .

August 8, 2016, 8:28 am
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Hello All ,

In my environment recently i have faced a issue where one of the user complaints that his enabled out of office (OOF) is automatically disabled .

That user come to know about this issue from his colleagues ,Most of his colleagues reported to him that his OOF is not enabled,but as per the user statement it was enabled earlier. Due to this issue user logged in and found OOF was in the disabled state and then user enabled OOF again through his outlook profile.

Now i wanted to know whether this user had already enabled his OOF earlier or not ?

If it is already enabled , then please tell me the where i can find the OOF enable and disable log history for the particular mailbox in exchange ?

What could be relevant attribute in AD for the OOF (enable/disable) in the user mailbox ?

Due to password expiration , if a any user changes his password will disable the already enabled OOF in exchange mailbox ?

Note : Affected user password was expired and the user changed his password on the same day on where this OOF issue is reported by his colleagues .I mean to say that the password expiration/new password change on the user mailbox and user's colleagues reported about the OOF issue was happened on the same day.

Thanks & Regards S.Nithyanandham

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Renew Self Signed Certificates On Exchange 2010 Edge Servers

August 8, 2016, 11:04 am
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Hello.

All servers are 

Exchange 2010 SP3 RU3

4 Hub servers (Internal)

4 Edge Servers (In the DMZ)

2 Self Signed Certificates will expire soon on 2 Edge Servers.

I set up a plan to renew the certs on both EDGE Servers and install the certs on the HUB Servers.

  • Get-ExchangeCertificate –Thumbpring “whatever IT IS” | New-ExchangeCertificate
    • A new Thumbprint will be generated
  • Run Get-ExchangeCertificate and copy the new Thumbprint
  • Enable-ExchangeCertificate –Services “SMTP”

We need to rebuild the Edge Subscription:

  • New-EdgeSubscription –filename “c:\EdgeSubscriptionFile.xml” (this command generates the subscription file that the hub needs)
  • Copy the “c:\EdgeSubscriptionFile.xml” to the internal Hub Server

On the Hub Transport Server remove the existing subscription

  • Get-edgesubscription –Identity “Name of the HUB Server”  | remove-edgesubscription 
  • Get-ExchangeCertificate –Thumbpring “EF8D3A7566E4C60C344117B3CE82F42B7D14E49F” | New-ExchangeCertificate
    • A new Thumbprint will be generated
  • Run Get-ExchangeCertificate and copy the new Thumbprint
  • Enable-ExchangeCertificate –Services “SMTP”

We need to rebuild the Edge Subscription:

  • New-EdgeSubscription –filename “c:\EdgeSubscriptionFile.xml” (this command generates the subscription file that the hub needs)
  • Copy the “c:\EdgeSubscriptionFile.xml” to the internal Hub Server (you have to copy to ALL hub transport servers)

On the Hub Transport Server remove the existing subscription

  • Get-edgesubscription –Identity “Name of Server”  | remove-edgesubscription 

My question is would I need to copy the newly generated XML file to all Hub Transport Servers? In this case 4 of them?

thanks,

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Outlook - To Do bar

April 7, 2016, 10:33 am
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Hi,

Having an odd issue with 1 outlook client. To do tasks on to do bar are duplicating. If I look at just to do list they are not.

That's both in cache and online mode. I OWA there are no duplicates, but obviously I can't check the to do bar.

I ran outlook /resettodobar which does the job initially. However when outlook closed and re-opened duplicates re-appear.

IMAP is disable. there are no integration with anything except exchange 2010. PST wasn't involved and auto-archive was/is disabled.

I'm guessing at this point I would have to use MFCMAPI?

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Outlook 2010 no longer works under Windows 10 pro

August 8, 2016, 6:22 am
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Hi,

scanpst.exe does not appear to exist in windows 10!  When I upgraded from Win 7 Outlook worked fine, but then I had to do a manual re-install.Everything works just fine except microsoft Outlook. The error message is "Cannot open your default e-mail folders. Outlook cannot start because a data file to send and receive messages cannot be found.
Check your settings in this Microsoft Outlook profile. In Microsoft Windows, click the start button, and then click Control Panel.
Click user accounts, and then click mail. Click Show Profiles, select this profile, and then click Properties."

One problem - it simply will not allow me to open Outlook so I cannot do anything. Windows 10 pro does not have mail profiles..... help please.....other mail programs work fine (emclient, Thunderbird) but they are not as good as Outlook, and I have reintsalled it more times than I care to think, run as administrator, tried Office 2013 (which is horrible)....

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Exchange 2010 retention policy

August 8, 2016, 11:36 am
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Hi,

Just trying to get clarification around Retention Policy tags.

If I have to delete everything in mailbox that is older than 3 years is it sufficient to just create "All other folders in the mailbox" tag type and set it to delete, or do I also have to create Inbox, deleted items, Sent Items tag type and use both under the same policy(some users do have subfolders under Inbox vs Root and I would like to delete email in those subfolders as well).

Will "All other folders in the mailbox"  tag take care of both user created and default inbox folders(inbox, deleted items, etc...)?

Thanks in advance....



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redirect individual email

August 7, 2016, 8:04 pm
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Is there a way to redirect individual emails without creating a rule?   I don't want every email redirected.  It would be nice to have the option of "redirect", just like we have the option of "forward."  I use the Outlook web app. I also use Apple mail and any iCloud email gives me the option to redirect, but Exchange with Apple mail does not.

Any suggestions? Thank you.

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Issue with DAG redundancy

August 3, 2016, 3:18 am
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Hi.

We have 2 EX2010 servers, DAG is configured with Share Majority.

When Internet channel is down in Branch Office (Master Server) All bases are dismounted. So we have no profit from such configuration of Cluster. Please advice actions to avoid this and to reconfigure cluster with right way.

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exchange server 2010 with outlook 2007 clients

August 4, 2016, 2:16 pm
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Hi,

I hope someone can please shed some light on this issue. Basically we have a numbers of users who are experiencing problems forwarding on some external emails they have received to others users in the organisation. I have tested owa and they can forward on fine.  Any suggestions as I guess it means its outlook 2007? Thanks in advance

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Public folder not showing up as mail enabled, but it's receiving email.

June 18, 2013, 8:52 am
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I've got several mail-enabled public folders that are showing up as not being mail-enabled in the public folder console, but are receiving email. If I run get-publicfolder -identity "\folder\name" | fl it shows that the folder is mail-enabled and all of the information listed there matches up with other folders that are showing up correctly. 

With one of the folders doing this, I selected to mail enable it and see what happened. It accepted it, but it assigned it a completely different address, though if I search AD for the old address, it shows that it's attached to the very same public folder. Also, if I check the GAL, the public folder shows up twice, one with the old address and one with the new. 

Any suggestions? Thanks! 


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Office 365 domain migration

August 9, 2016, 1:34 am
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Hi,

I have customer that he has emails hosted on ISP with around 120 users, and he want to migrate his domain to office 365 but the tricky here he want to 100 users work under office 365 and the remaining 20 users work on old ISP with the same domain name and emails for both office 365 and old ISP. Is that possible ?

please suggest if possible or not and why

Thanks 



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mx.google.com rejected your message to the following e-mail addresses

August 9, 2016, 5:28 am
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Last week on a client SBS2011 box the SKY business broadband went down and I had to switch the server gateway to a BT ADSL with static for a few hours to keep things running.

Once the connection restored I went to switch back, (192.168.1.253 to .254) but the process hung and when I opened DNS it was not populated.  I checked the DNS Server service and it was stuck closing down but it did eventually close and after restarting I could see all my DNS info and all seemed ok.

That is until I started to get users sending me bounce-backs like this:



mx.google.com rejected your message to the following e-mail addresses:

'clientemail@gmail.com' (clientemail@gmail.com)

mx.google.com gave this error:
[2a02:c7d:464:7200:346e:dc36:8ea6:6540] Our system has detected that this message does not meet IPv6 sending guidelines regarding PTR records and authentication. Please reviewhttps://support.google.com/mail/?p=ipv6_authentication_error for more information. uh16si30692310wjb.8 - gsmtp

Your message wasn't delivered due to a permission or security issue. It may have been rejected by a moderator, the address may only accept e-mail from certain senders, or another restriction may be preventing delivery.


Here are the headers:
Diagnostic information for administrators:

Generating server: CLIENTSVR.CL.local

clientemail@gmail.com
mx.google.com #550-5.7.1 [2a02:c7d:464:7200:346e:dc36:8ea6:6540] Our system has detected that 550-5.7.1 this message does not meet IPv6 sending guidelines regarding PTR 550-5.7.1 records and authentication. Please review 550-5.7.1https://support.google.com/mail/?p=ipv6_authentication_error for more 550 5.7.1 information. uh16si30692310wjb.8 - gsmtp ##

Original message headers:
Received: from CLIENTSVR.CL.local ([fe80::25dd:f159:ecbf:ad7b]) by
CLIENTSVR.CL.local ([fe80::25dd:f159:ecbf:ad7b%14]) with mapi id 14.03.0301.000;
Mon, 8 Aug 2016 16:44:13 +0100
From: John Doe <John.Doe@myclient.co.uk>
To: "'clientemail@gmail.com'" <clientemail@gmail.com>,
Subject: 'Staircasing' Valuation for Mr Smith
Thread-Topic: 'Staircasing' Valuation for Mr Smith
Thread-Index: AdHxi7YTFQNyDoO6T2m0yJBO5GinDQAAAAHA
Disposition-Notification-To:John Doe <John.Doe@myclient.co.uk>
Date: Mon, 8 Aug 2016 15:44:13 +0000
Message-ID: <1e5c90cc-717c-4534-b2d7-315b1e754999@CLIENTSVR.CL.local>
Accept-Language: en-GB, en-US
Content-Language: en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
x-originating-ip: [192.168.1.165]
Content-Type: multipart/alternative;
boundary="_000_1e5c90cc717c4534b2d7315b1e754999CAB 002cglocal_"
MIME-Version: 1.0


I researched the issue and found that following the process hang switching gateway IP ALL the iPv4 and 6 NIC addresses in DNS had been ticked so I noted the 2 addresses for my actual NIC, unticked the rest and switched back to root hints as suggested by, 'Fix My Network'.

I also noted that in all outgoing SMTP headers they now contain the iPv6 info fe80::25dd:f159:ecbf:ad7b instead of iPv4 192.168.1.1.

Can anyone advise how to resolve this?

Kind regards,
Andrew
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Retrieving all ResourceDelegates across Domain as list of sAMAccountNames

August 9, 2016, 8:20 am
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Hi , I am using the following script to retrieve a list of all ResourceDelegates on our domain: (Exchange 2007)

Get-Mailbox -ResultSize unlimited | Get-MailboxCalendarSettings | where { $_.ResourceDelegates -ne "" } | Select-Object identity,@{Name=’ResourceDelegates’;Expression={[string]::join(",", ($_.ResourceDelegates))}}

which works fine.

However, the 'ResourceDelegates' brought back by the command are of type 'displayName'.

I am using the output as part of a later automation process, and need the retrieved delegates as 'sAMAccountName'

Does anyone have an idea how to modify the script so it brings back sam's instead of displayNames?

Thank you !

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