This issue may be encountered when migrating to Exchange 2016 from Exchange 2013 when MAPI over HTTPS is enabled. The default Exchange 2013 MAPI over HTTPS authentication settings set IIS and Internal Authentication methods as Negotiate and External as null. This is shown below:
The Default Exchange 2016 MAPI over HTTPS authentication settings are configured as "Ntlm, OAuth and Negotiate"
Proxying MAPI over HTTPS connections between Exchange 2016 and Exchange 2013 requires NTLM be enabled. The default Exchange 2013 MAPI over HTTPS authentication settings will cause Outlook connectivity issues when both Exchange 2016 and Exchange 2013 are in the same Active Directory site.
The error which is generated by the Exchange Remote Connectivity Analyzer in this configuration is as follows:
To ensure all servers are configured correctly to proxy connections between Exchange 2013 and Exchange 2016, run the following PowerShell command:
Get-MapiVirtualDirectory | Set-MAPIVirtualDirectory -IISAuthenticationMethods Ntlm, OAuth, Negotiate
Hope this post has been helpful.
If you need IT Support in Perth, contact Avantgarde Technologies today.
The Default Exchange 2016 MAPI over HTTPS authentication settings are configured as "Ntlm, OAuth and Negotiate"
Proxying MAPI over HTTPS connections between Exchange 2016 and Exchange 2013 requires NTLM be enabled. The default Exchange 2013 MAPI over HTTPS authentication settings will cause Outlook connectivity issues when both Exchange 2016 and Exchange 2013 are in the same Active Directory site.
The error which is generated by the Exchange Remote Connectivity Analyzer in this configuration is as follows:
Testing the MAPI Mail Store endpoint on the Exchange server. | |||||||||||||||
An error occurred while testing the Mail Store. | |||||||||||||||
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To ensure all servers are configured correctly to proxy connections between Exchange 2013 and Exchange 2016, run the following PowerShell command:
Get-MapiVirtualDirectory | Set-MAPIVirtualDirectory -IISAuthenticationMethods Ntlm, OAuth, Negotiate
Hope this post has been helpful.
If you need IT Support in Perth, contact Avantgarde Technologies today.
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