Forum Discussion
Exchange SE 15.2.2562.46: MRSProxy returns HTTP 401 after successful NTLM authentication
Hello, Anonymization note: The domain names contoso.com and contoso.local, the server name EXCH-SE-01, and the account name CONTOSO\MigrationAccount used in this post are anonymized placeholders....
We're having the same issue/same errors. If you find a fix, please share.
Thanks for confirming.
We have opened a support case with Microsoft, and the issue is currently being investigated. I will update this thread when Microsoft provides a confirmed root cause, fix, or supported workaround