Outlook Trying to contact Exchange Server

  • Thread starter Thread starter maitakeboy
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maitakeboy

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My users in two of three regional offices connected via the same type of VPN began experiencing suddenly, towards the end of August, strange Outlook behavior. When they would click on an email or try to compose one, their Outlook would pop up a message saying "Outlook is trying to retrieve data from the Exchange Server". After 30 seconds or so, connection would be made and they could work normally.

They are all in Cached Mode. No changes in the network hardware or configuration were made. Throughput on the VPN's have been normal. One of my offices is not experiencing this issue. There are slightly different network setups in each of the 3 offices, but as I said earlier, prior to the onset of this issue, and since, there has been no noticeable problem with general network connectivity. Each of the offices have different Internet providers. This is happening with Outlook 2016

I have tried numerous solutions, some of which had no effect, some made it worse, some actually seemed to solve the issue, but then it returned. Here is a list of solutions I've tried:

  1. Turn off Cached Mode - This seemed to make things worse.
  2. Delete and recreate .ost file - This seemed to temporarily fix the issue, but within a week it returned
  3. Stop the Automatic Download of Images through Trust Center settings - No Effect
  4. Rebooted the VPN router on both sides

I'm at a bit of a standstill with it. Since it's two offices, with 2 people in one office and 5 in the other, I have a hard time believing it's Outlook issues. That's why I haven't proceeded with the Office Repair or the profile deletion/recreation. And with no general network dysfunction, I'm running out of things to try. The fact that the other office has no problems at all says it's not a general network issue. And when their Outlook connects, everything works fine. But then it crops up after a long period of disuse of Outlook.

How can I best diagnose this? What other things can I try?

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