Outlook 365 (v15) recently stopped working and I ran a quick repair to get it back up. Since then, I've noticed some bizarre performance issues, like taking 2-3 seconds to switch between folders, during which time the entire system (mouse cursor, other programs, etc) stutters.

I ran Process Monitor (procmon) to see what was going on, and there are multiple cycles (roughly 10 or so) of this:

1. Query the registry and find the IContact interface ({85109845-6AE2-4B6B-9524-65BA203E5B7D})

2. This has a corresponding TypeLib that points to {B9AA1F11-F480-4054-A84E-B5D9277E40A8}, which is the Unified Collaboration API 1.0 Type Library.

3. This type then points over to the installed Skype (C:\Program Files (x86)\Skype\Phone\Skype.exe\3).

4. Outlook.exe then reads the beginning and end of Skype.exe (I'm assuming to validate the file and check the version).

That whole process then repeats over and over again. Each cycle only takes a fraction of a second, but because it runs so many times, it adds up quickly.

That said, it sounds like Outlook is trying to work with Skype to present some kind of unified communications, but I don't want that on my system. Any idea whether removing that particular starting key (85109845-6AE2-4B6B-9524-65BA203E5B7D) is possible without breaking anything else?

• Moved by Edward ZMicrosoft contingent staff 5 hours 24 minutes ago not developer

Do you have any COM add-ins installed for Outlook? Skype for Business?

I only have two active COM add-ins. One is an internal add-in from my company, and there is no relationship between it and Skype. The other is the Microsoft VBA for Outlook add-in, but hovering over it indicates that it isn't loaded.

Those particular GUIDs mentioned above are installed by Skype, apparently, but I can't find any options to turn off that integration. I ended up removing the two keys for 85109845-6AE2-4B6B-9524-65BA203E5B7D and process monitor indicated the system was no longer doing all those underlying checks all the time.

Hi JHilgeman,

>> I ended up removing the two keys for  85109845-6AE2-4B6B-9524-65BA203E5B7D and process monitor indicated the system was no longer doing all those underlying checks all the time.

Do you mean that your issue has been resolved? Since this forum is  for Developer discussions and questions involving Microsoft Outlook, and based on your description, it seems that you are not developing outlook. Your issue seems to be more related with Office product. I will move this thread to the more related forum.

Reference: http://social.technet.microsoft.com/Forums/en-US/home?forum=outlook

Thanks for your understanding.

Best Regards,

Edward