I originally posted this in the Outlook forum, but was pointed here instead.

I have a number of different Outlook profiles, for unrelated Exchange accounts.

I recently noticed that a client's firewall log was showing unexpected failed logon attempts to port 443, from my IP, using my PC name and username. I eventually found that these connections corresponded to my starting Outlook 2010 on my PC, loading my usual Outlook profile (unrelated to the client, although I do have another Outlook profile for this client's Exchange server.)

Recreating my usual profile didn't fix it. Eventually I created a test profile that contains just an empty PST file and the Fax service, and even opening this profile causes a failed HTTPS (presumably RPC over HTTPS) connection to the client.

Why would Outlook be making HTTPS connections (presumably RPC over HTTPS) to a server that isn't referenced in a profile? How can I remove such references?

Thanks.

Have you checked whether there is a setting Outlook Anywhere?

Eg for disable: Set-CASMailbox tony@contoso.com -DisplayName "Tony Smith" -MAPIBlockOutlookRpcHttp $true

• Edited by I-Evgeny 2 hours 56 minutes ago

Thanks, but I don't want to disable OA for any profile. However, I want disable (or at least understand why) Outlook attempting to contact a server that is not (or should not be) referenced in the current profile.

Have you checked whether there is a setting Outlook Anywhere?

Eg for disable: Set-CASMailbox tony@contoso.com -DisplayName "Tony Smith" -MAPIBlockOutlookRpcHttp $true

• Edited by I-Evgeny Monday, March 09, 2015 4:22 AM
• Marked as answer by Niko.ChengMicrosoft contingent staff, Moderator 23 hours 6 minutes ago
• Unmarked as answer by JWit 3 hours 48 minutes ago

This was marked as the answer, but it is not.

I use RPC-over-HTTP for all the accounts, so I can't disable it.

The question is why is Outlook attempting to connect to the server referenced in profile X when I'm connecting (successfully) to a entirely different server referenced in different profile Y?

Thanks.