

If a shared calendar is not heavily used by a user, it should be moved (you can drag and drop it in Outlook) to the “Shared Calendars” folder. These calendars are synchronized regularly while Outlook is running. Limiting the number of calendars in the “My Calendars” folder will improve Outlook performance. Graphics acceleration can be disabled by going to File | Options | Advanced and checking the “Disable Graphics Acceleration” box. However, this feature is not compatible with all graphics cards and can actually degrade performance, cause blurry text, and cause Outlook to hang. Outlook for Windows uses graphics acceleration to improve visual performance. Review this resource to manage your add-ons. It is recommended that any add-ons not needed by the user be disabled. For example, the iCloud add-on for Outlook for Windows has had many issues since its release and should be disabled if it is not needed. Outlook add-ons can be the cause of significant performance degradation.

See Office 365 - Download/Install Office 365 article for more details. We recommend that you discuss these changes with your local IT administrator prior to making these changes.įor best support and access to latest features of Office/Outlook, please make sure you are using most up-to-date version of Office/Outlook.

#MICROSOFT OUTLOOK DESKTOP APP RUNNING VERY SLOW SOFTWARE#
Important: Some of the information below asks you to make changes to your software and/or usage of them. Below are some steps that may improve performance in Outlook desktop clients when configured with an Office 365 (Exchange Online) account. Heavy calendar/email users have noticed performance issues when using Outlook and other desktop clients.
