Where Outlook Stores Calendar Data and How to Restore It
Learn where Microsoft Outlook stores your calendar data based on your account type, and discover how to locate and restore missing calendar entries from local PST backup files.
Read more ›Email Problems
Quick fixes for Outlook send/receive errors, missing messages, sync delays, and stubborn mail profile problems.
Latest
2564 ResourcesTroubleshoot Outlook.com Sender DNS and Reverse DNS Record Issues
Learn how to troubleshoot rejected Outlook.com emails caused by mismatched DNS A and PTR records. Adjust your server's reverse DNS policy to accept Microsoft emails.
Read more ›Fix Outlook and Samsung Mail Not Syncing Deleted Emails
Troubleshoot IMAP synchronization issues where deleted emails in Outlook 365 do not appear in the Samsung Mail Trash folder. Learn how to map IMAP folders correctly.
Read more ›How to Fix SharePoint Calendar Events Showing as Busy in Outlook
Learn why SharePoint calendar events appear as busy in Outlook by default and discover the best workarounds for managing your free/busy status.
Read more ›How to Keep Outlook Calendar Items in the Correct Calendar
Learn how to prevent Outlook calendar items from returning to original accounts and losing color categories by setting up a default PST data file.
Read more ›How to Bulk Update SMTP Addresses for Azure AD Connect Users
Learn how to resolve the Exchange Online write scope error by bulk updating SMTP proxy addresses for Azure AD Connect users in your on-premises Active Directory.
Read more ›How to Block Direct External Delivery to onmicrosoft.com in Hybrid Exchange
Learn the implications of blocking direct external email delivery to onmicrosoft.com domains in an Exchange Hybrid setup and how to seek expert routing guidance.
Read more ›How to Change the Sender Address for Exchange Online NDRs
Learn how to change the default external postmaster address for Exchange Online NDRs using PowerShell to improve email deliverability and avoid spam filters.
Read more ›Fix Magento 2 SMTP Email Exception with Microsoft 365
Learn how to resolve the Laminas Mail SMTP RuntimeException in Magento 2 when sending emails through Microsoft 365 or Outlook SMTP servers.
Read more ›How to Fix Remote Connectivity Analyzer Outlook Test Errors
Troubleshoot and fix HTTP 500 errors during Microsoft Remote Connectivity Analyzer Outlook tests by verifying MAPI settings and using Modern Authentication.
Read more ›How to Fix Thunderbird Cannot Authenticate with Outlook SMTP
Learn how to resolve Thunderbird authentication failures with Outlook or Hotmail SMTP servers when standard port and security troubleshooting steps do not work.
Read more ›How to Prevent Delegates from Viewing Private Outlook Calendar Appointments
Learn how to stop Outlook delegates from seeing your private calendar appointments by adjusting delegate access permissions in Account Settings.
Read more ›How to Change Calendar Appointment Font Color in Outlook on the Web
Learn how to improve calendar appointment readability in Outlook on the Web. Discover easy workaround methods using color categories when font colors cannot be natively changed.
Read more ›Why Exchange Last Logon Time Differs from Azure AD Sign-In Activity
Learn why the last logon time in Exchange Online differs from Azure AD sign-in activity, especially involving shared mailboxes, calendars, and service impersonations.
Read more ›Why Outlook on the Web Is Missing an Outbox Folder & Solutions
Discover why Outlook on the web lacks a traditional Outbox folder. Learn how to manage scheduled outgoing messages and find unsent emails using built-in web features.
Read more ›How to Fix Cannot Move Emails Between Accounts in Outlook for Mac
Unable to move emails between accounts in Outlook for Mac? Learn how to fix this issue by switching to Legacy Outlook or reconfiguring your IMAP settings.
Read more ›How to Fix Incorrect Shared Mailbox Display Name in Outlook
Learn how to resolve issues where the shared mailbox display name appears incorrectly to external recipients in Outlook by checking Microsoft 365 admin settings.
Read more ›How to Fix Hotmail Attachment Document Preview Error
Learn how to fix the 'Something went wrong when the document preview was created' error in Hotmail. Discover easy solutions to view and open your email attachments.
Read more ›Try what you just learned
Download WPS Office free and open Word, Excel, PowerPoint, and PDF files in one lightweight app.