by on December 28, 2025
There are a number of possible reasons for Outlook to behave this way. We've presented the potential solutions in order from quickest to most time consuming. Outlook stores certain data, such as email signatures and the spelling checker dictionary, in the AppData folder. If the network is performing slowly, Outlook must wait for read and write operations to the AppData directory to finish. Many of these items can be automatically checked by the Classic Outlook Advanced Diagnostics troubleshooter...
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