Thanks Marcde. Tried cached mode didn't work in our situation.
Finally, I delete the user's Windows profile and create a new one solve the problem. :smileyhappy:
Can you try the affected account on another machine?
Thanks Tony. I almost forgot this point. Just tried one of the affected account in other Windows 10 machine. Open archived email didn't have any delay. I think I need to try rebuild their user profile.
out of curiosity, are you using Outlook in online mode when it is problematic and in cached mode when there is no problem?
We've had this a while ago. Clients in online mode had exactly the behavior that you described due to the way access to downloaded items is handled. On the other hand, clients in cached mode did not show that behavior.
Regards
Marc
Thanks Marcde. Tried cached mode didn't work in our situation.
Finally, I delete the user's Windows profile and create a new one solve the problem. :smileyhappy:
