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Microsoft 365, Office and Teams: solutions for everyday problems

Microsoft 365 and Office tools are part of everyday work, but problems with activation, syncing and account access can cost you hours. On this page we have gathered the most common situations users in Serbia run into, from the message that the product is not licensed to Excel spreadsheets that freeze on every entry.

Whether you are struggling with OneDrive that will not transfer files, Teams that cannot see your camera or microphone, or a Word document you cannot open, every guide walks you through the checks step by step to a lasting fix. Topics also cover shared mailbox settings, SharePoint access and MFA sign-in, for home users as well as small and medium businesses.

  1. Office says product is not licensed: how to activate itIf Office shows a message that the product is not licensed, check your account, subscription, and connection. Learn the steps to activate and fix the error. Easy 10 min
  2. Excel is slow and freezing: how to speed up large spreadsheetsExcel freezing with large spreadsheets? Learn how to speed it up: turn off automatic calculations, clean up formulas, reduce formatting, and repair the file. Medium 25 min
  3. Word file is corrupted or not saved: how to recover itWord document won't open, shows an error, or wasn't saved? Learn how to recover it from AutoRecover, temporary files, and backup versions. Medium 15 min
  4. OneDrive not syncing files: how to fix the stallOneDrive stuck on "Syncing" or showing an error? Check the status, restart the client, reset the cache and restore sync without losing files. Easy 15 min
  5. Deleted file in OneDrive or SharePoint: how to restore itIf you accidentally deleted a file in OneDrive or SharePoint, don't worry. Learn how to restore it from the Recycle Bin, from previous versions, or with the help of an administrator. Easy 5 min
  6. Teams won't start or keeps crashing: how to clear the cacheIf Microsoft Teams won't start or crashes on launch, clearing the cache often solves the problem. Learn where the cache is located and how to safely clear it on Windows and macOS. Easy 10 min
  7. Teams notifications not arriving: how to get them working againNot getting Teams notifications for messages, calls, or meetings? Check Windows settings, Teams status, Do Not Disturb mode, and permissions, then get them working again. Easy 10 min
  8. Shared mailbox not showing in Outlook: how to add itShared mailbox not showing in Outlook even though you have permission? Check the license, automapping and cache, then add it manually through Account Settings. Medium 15 min
  9. SharePoint access denied: how to get site permissionsSharePoint shows you don't have access? Learn how to request permissions, check your account, and fix site access issues. Easy 10 min
  10. Microsoft 365 MFA sign-in fails: how to set it upMicrosoft 365 MFA sign-in failing? Check your phone time, verification number, Authenticator and backup methods, then set up sign-in again. Medium 15 min
  11. Excel shows #REF!, #VALUE! or #N/A: how to fix formulasExcel shows #REF!, #VALUE! or #N/A? Learn what each error means, how to find it and fix it without losing data in your spreadsheet. Easy 15 min
  12. OneDrive is full and blocks saving: how to free up spaceOneDrive is full and you cannot save files? Learn how to quickly free up space, remove duplicates and prevent it from filling up again. Easy 15 min
Didn't find a fix?The AI IT assistant is available 24/7. Describe the problem or send a screenshot of the error and get instructions for your case.Ask the AI IT assistant