Hi all

I am running Office 2016 on Microsoft Windows 10.

In the recent months (well....maybe even longer than that) Outlook has been shutting down regularly - mostly just "out of the blue" and sometimes even when I´m not really actively working with Outlook.

I don´t remember the exact error message before it shuts down - but it´s something like "Outlook is shutting down and will restart".

Several times now I have made repairs via "Scanpst.exe" and normally it gets a bit better with fewer shutdowns - at least for some time, but then after some time it gets back to normal with frequent shutdowns. Every time i make the scan and repair, the system tells me it found errors.

I have created MANY subfolders in Outlook and I probably have stored around 5.000 messages in those subfolders. Some of those messages are with attachments.
The size of the PST-file (which I have placed on a hard drive that is NOT the same hard drive where I have Windows 10 - if that has any relevance) - is around 2,3 Gb.

My own theory is that Outlook can´t handle that many messages - but I dont know for sure if that could be the problem here. Of course I could start deleting some of the old messages, but I am renting out 2 beach houses (my own beach house and the house of my sister) - and there is a lot of E-mail correspondance - and I want to be able to access old messages too without too much work.

How does the "archive" function in Outlook work? Until now I never enabled it - but could that be a solution? Maybe I can archive messages that are older than 1 year. I have heard that archiving in Outlook it will create a separate PST file for the archived messages.

Any help how to solve my problem is very much appreciated. Thank you.