I hope someone might be able to help me with  some questions I have.

We run Exchange 2016, this is all upto date, and started moving to Modern Authentication.

This I have managed to do for Outlook Clients on Windows. But when I start to use the following: Disable Basic authentication on Exchange Server virtual directories | Microsoft Learn

Our 1st exchange server is fine with it, but our 2nd Exchange throws up an error about IIS “the version of internet information services (IIS) that is running on server …….”

How do I fix this? Also when moving from Basic Authentication to Modern, do Mobile phone clients have to recreate the connection, or will it connect to Modern?

I have enabled Modern Authentication using the Entra Sync which gives the OAuth option.

If someone has any help, or knows of a company who would fix this for a charge, let me know.

​I hope someone might be able to help me with  some questions I have.We run Exchange 2016, this is all upto date, and started moving to Modern Authentication.This I have managed to do for Outlook Clients on Windows. But when I start to use the following: Disable Basic authentication on Exchange Server virtual directories | Microsoft LearnOur 1st exchange server is fine with it, but our 2nd Exchange throws up an error about IIS “the version of internet information services (IIS) that is running on server …….”How do I fix this? Also when moving from Basic Authentication to Modern, do Mobile phone clients have to recreate the connection, or will it connect to Modern?I have enabled Modern Authentication using the Entra Sync which gives the OAuth option.If someone has any help, or knows of a company who would fix this for a charge, let me know.  Read More

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