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  • There is no limit except for hard drive storage space on Outlook for Mac. Outlook on mac doesn't store data in pst or ost files - it just caches data in a similar folder to below:

    ~/Library/Group Containers/UBF8T346G9.Office/Outlook/Outlook 15 Profiles/Main Profile

    What version of Outlook is being used? If its 2016 or below, should really upgrade as there are lots of improvements for Office for Mac in the latest editions.

    Here are instructions on how to uninstall:

    https://support.microsoft.com/en-us/office/uninstall-office-for-mac-eefa1199-5b58-43af-8a3d-b73dc1a8cae3

    A fresh install may help, but if his MBP is underpowered (think 5400 rpm HDD and/or low memory), a large mailbox could be requesting too many resources and cause the app crash

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    • There is no limit except for hard drive storage space on Outlook for Mac. Outlook on mac doesn't store data in pst or ost files - it just caches data in a similar folder to below:

      ~/Library/Group Containers/UBF8T346G9.Office/Outlook/Outlook 15 Profiles/Main Profile

      What version of Outlook is being used? If its 2016 or below, should really upgrade as there are lots of improvements for Office for Mac in the latest editions.

      Here are instructions on how to uninstall:

      https://support.microsoft.com/en-us/office/uninstall-office-for-mac-eefa1199-5b58-43af-8a3d-b73dc1a8cae3

      A fresh install may help, but if his MBP is underpowered (think 5400 rpm HDD and/or low memory), a large mailbox could be requesting too many resources and cause the app crash

      Was this post helpful? thumb_up thumb_down
    • spicehead-2i3sw wrote:

      There is no limit except for hard drive storage space on Outlook for Mac. Outlook on mac doesn't store data in pst or ost files - it just caches data in a similar folder to below:

      ~/Library/Group Containers/UBF8T346G9.Office/Outlook/Outlook 15 Profiles/Main Profile

      What version of Outlook is being used? If its 2016 or below, should really upgrade as there are lots of improvements for Office for Mac in the latest editions.

      Here are instructions on how to uninstall:

      https://support.microsoft.com/en-us/office/uninstall-office-for-mac-eefa1199-5b58-43af-8a3d-b73dc1a8cae3

      A fresh install may help, but if his MBP is underpowered (think 5400 rpm HDD and/or low memory), a large mailbox could be requesting too many resources and cause the app crash

      Thank you. From your lead, I found these steps to uninstall Outlook. Just in case anyone else needs it in the future.

      Force quit Outlook from the Dock or the Apple Menu.
      Launch Activity Monitor > Find Outlook > click the X button> click Quit in the pop-up window.
      Option 1: Open the Application folder > Drag the Outlook icon to the Trash Bin.
      Option 2: Open Launchpad > Click and hold the Outlook icon > click the X button.
      Find Outlook's service files at the locations below and move them to the Trash Bin.
      ~/Library/Group Containers/UBF8T346G9.Office/Outlook/Outlook 15 Profiles/Main Profile
      ~/Library/Preferences/com.microsoft.Outlook
      ~/Library/Application Support/com.microsoft.Outlook
      ~/Library/Application Scripts/com.microsoft.Outlook
      ~/Library/Caches/com.microsoft.Outlook
      ~/Library/Containers/com.microsoft.Outlook

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    • Uninstalll is a Windows system procedure, it doesn't really exist as such on the Mac.

      A 16" MBP has very fast SSD storage and will be the best performing Intel Mac portable available, it shouldn't have problems with even a large mailbox.

      Crashing is often due to corrupted preferences, try removing those first. You can also boot into Safe Mode to see if there is a conflict going on.

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