Recently, I came across with an issue in one of my Client site where Exchange proxy settings in outlook for multiple users was disapparing automatically even after putting it manually.
After searching alot on the Bing/Google, did not find any answer.
Then I started to check the Exchange configuration for the users and found that there was a scheduler configured on the server which was responsilbe to disable the Outlook RPC over HTTP / Outlook Anywhere.
Below is the sample configuration of the scheduler reponsible to disable the Outlook RPC over HTTP / Outlook Anywhere for the users:
Set-CASMailbox -Identity tony@contoso.com -MAPIBlockOutlookRpcHttp:$true
So, the solution is to take the users out of the schedular and enable the Outlook RPC over HTTP / Outlook Anywhere for them using the following command:
Set-CASMailbox -Identity tony@contoso.com -MAPIBlockOutlookRpcHttp:$False
