One more suggestion is to acquire the skills of Microsoft 365 backups to recover your organization’s data in cases of unpredictable system issues and glitches. Also, don’t forget to update your shared calendars frequently and update your Windows machine. Refer to below blog to speed-up Outlook application in Windows 10 or 11 operating system. I used the information to create a Registry Entry that will cause Outlook to check for new mail every 15 seconds. Another alternative might be Outlook on the web, which would sit somewhere between Outlook mobile and Outlook desktop in most cases. There are a few simple steps you can take to keep your Outlook running smoothly.

Add an Outlook.com alias to your account and send email to Gmail users using that alias. For more information, go to Add or remove an email alias in Outlook.com. If you're having problems sending or receiving email, read how to Fix Outlook.com email sync issues. Outlook forwards meeting invitations to other attendees without anyone actually sending an update or forwarding an invite. This happens to accounts that are configured in the iOS Mail app. If you can't choose any of the menu options, type inside an email message, calendar event, or contact, Outlook may have frozen.

Starting Outlook in safe mode, which starts Outlook without add-ins loaded, can tell you if an add-in is the source of the problem. Turn off all the add-ins, close Outlook, and reopen it (not in Safe Mode). If it opens correctly, you can enable the add-ins one by one. After turning on each one, close and reopen Outlook to see if it loads correctly. It will help pinpoint the troublesome add-in you can remove or replace.

It also offers a filter option