Sebastian Talmon
asked on
Error 400 BadRequest for some Outlook RpcHttp Proxy Connections through Exchange 2016 to Exchange 2013
Hi,
we are in progress of migrating an Exchange 2013 to Exchange 2016.
Clients are already connecting through the new CAS Server (Exchange 2016) to their Mailbox on Exchange 2013.
Some Clients can not connect to some of the Mailboxes (Offline Mode) - also some clients have connections to shared mailboxes and have problems with only some of them, so not possible to limit it to specific users or outlook clients.
On Exchange 2013 we get the http errors in the log:
C:\Windows\System32\LogFil es\HTTPERR :
On the Exchange 2016 Errors are visible in the HttpProxy RpcHttp Log (<Exchange Server Install Path>\Logging\HttpProxy\Rp cHttp)
HttpStatus: 200
BackEndStatus: 200
ErrorCode: InternalServerError
Method: RPC_OUT_DATA
ProxyAction: Proxy
GenericErrors: StreamProxy=StreamProxy-Re sponse-Exp ectReadCal lback;PossibleException=IOExcept ion;
Versions:
Outlook 2010 connecting through Exchange 2016 CU11 on Windows Server 2016 to Mailboxes on an Exchange 2013 CU20 on Windows Server 2012
Any Idea how to troubleshoot further?
(the Exchange is only available in the local domain, not possible to try testconnectivity.microsoft .com)
we are in progress of migrating an Exchange 2013 to Exchange 2016.
Clients are already connecting through the new CAS Server (Exchange 2016) to their Mailbox on Exchange 2013.
Some Clients can not connect to some of the Mailboxes (Offline Mode) - also some clients have connections to shared mailboxes and have problems with only some of them, so not possible to limit it to specific users or outlook clients.
On Exchange 2013 we get the http errors in the log:
C:\Windows\System32\LogFil
2018-10-29 10:00:27 x.x.x.x 19221 x.x.x.x 444 HTTP/1.1 RPC_IN_DATA /rpc/rpcproxy.dll?server.localdomain:6001 400 2 BadRequest MSExchangeRpcProxyAppPool
On the Exchange 2016 Errors are visible in the HttpProxy RpcHttp Log (<Exchange Server Install Path>\Logging\HttpProxy\Rp
HttpStatus: 200
BackEndStatus: 200
ErrorCode: InternalServerError
Method: RPC_OUT_DATA
ProxyAction: Proxy
GenericErrors: StreamProxy=StreamProxy-Re
Versions:
Outlook 2010 connecting through Exchange 2016 CU11 on Windows Server 2016 to Mailboxes on an Exchange 2013 CU20 on Windows Server 2012
Any Idea how to troubleshoot further?
(the Exchange is only available in the local domain, not possible to try testconnectivity.microsoft
2018-10-29 10:00:27 x.x.x.x 19221 x.x.x.x 444 HTTP/1.1 RPC_IN_DATA /rpc/rpcproxy.dll?server.localdomain :6001 400 2 BadRequest MSExchangeRpcProxyAppPool
1- It’s recommended to modify the valid port registry
2- try to move back these users who is "offline mode" from exchange server 2016 to 2013 , tell me what happens
Do you have DR site?
ASKER
Thanks for your suggestions
As a quick&dirty workaround we disabled Kerberos Auth, so users can now work again (see my comment above).
I will try your solutions if I am able to enable Kerberos again in the next week, and report back if it was successful
As a quick&dirty workaround we disabled Kerberos Auth, so users can now work again (see my comment above).
I will try your solutions if I am able to enable Kerberos again in the next week, and report back if it was successful
This question needs an answer!
Become an EE member today
7 DAY FREE TRIALMembers can start a 7-Day Free trial then enjoy unlimited access to the platform.
View membership options
or
Learn why we charge membership fees
We get it - no one likes a content blocker. Take one extra minute and find out why we block content.
ASKER