How to Change Green Calendar Invitations Back to Blue in New Outlook
Learn how to fix the issue of calendar invitations appearing green in the New Outlook desktop client and easily change them back to the default blue color.
Read more ›Email Problems
Quick fixes for Outlook send/receive errors, missing messages, sync delays, and stubborn mail profile problems.
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2564 ResourcesHow to Enable External Access to On-Premises Email in a Hybrid Environment
Learn how to provide secure external webmail access without a VPN for on-premises email users in a Microsoft Exchange hybrid environment.
Read more ›Why Microsoft Bookings Shows Outlook Appointments as Busy
Discover why Microsoft Bookings displays staff Outlook calendar events as 'Busy' without details, and learn how privacy settings impact appointment visibility.
Read more ›How to Fix POP Email Not Syncing in the New Outlook
Troubleshoot POP email accounts not syncing or downloading incoming messages in the New Outlook. Learn why POP isn't supported and how to resolve IMAP server settings.
Read more ›How Far Back Can Exchange Online Message Trace Search?
Discover the time limits for Exchange Online Message Trace searches, especially after migrating from an on-premises server, and learn how to find older email logs.
Read more ›How to Rebuild Outlook OST Files After Deletion
Learn how to rebuild and recover a deleted or corrupted Outlook OST file by recreating your local mailbox cache using the Control Panel settings.
Read more ›How to Send Personalized Bulk Emails with PDF Attachments in Excel and Word
Learn how to send personalized bulk emails with individual PDF attachments using Word and Excel mail merge, including solutions using VBA macros and add-ins.
Read more ›How to Fix MailMate Connection to Microsoft 365 Exchange Account
Troubleshoot MailMate connection issues with your Microsoft 365 employer account. Learn how to handle OAuth 2.0 authentication and missing app passwords.
Read more ›How to Fix Yahoo Email Deferral Error 550 5.4.300 for Specific Domains
Resolve Yahoo email deferral errors 550 5.4.300 and 421 connection-dropped. Learn how to fix Microsoft 365 domain authentication issues including SPF, DKIM, and DMARC.
Read more ›Fix Missing OneDrive Attachment Option in Yahoo Mail for iPhone
Unable to attach OneDrive files in Yahoo Mail for iOS? Learn how to fix the missing OneDrive attachment option by updating apps and checking the iOS file picker.
Read more ›Fix Outlook on the Web Calendar and Profile Settings Issues
Learn how to resolve Outlook on the web problems like disappearing calendars, continuous loading errors, and missing profile settings by clearing cache or contacting support.
Read more ›Fix Microsoft Bookings with Me Not Sending Appointment Notifications
Learn how to troubleshoot Microsoft Bookings with Me when it stops sending appointment email notifications and the Default Scheduling Policy setting is missing.
Read more ›How to Share Free/Busy Status Between Outlook and Google Calendar
Learn how to resolve synchronization issues and share free/busy availability status between Microsoft Outlook and Google Calendar by adjusting permission settings.
Read more ›How to Fix Outlook Connected Account Email Sync Permission Errors
Learn how to troubleshoot and resolve Outlook.com connected account email sync permission errors by updating credentials, checking IMAP settings, and reauthenticating.
Read more ›How to Fix Outlook Send As vs Send on Behalf Mailbox Permissions
Learn how Outlook prioritizes Send As over Send on Behalf permissions for shared mailboxes and how to configure settings to display the correct sender identity.
Read more ›How to Fix Outlook Contacts Missing After iPhone Sync
Learn how to restore Outlook contacts that disappear or fail to sync after adding them on your iPhone. Step-by-step troubleshooting for iOS and Outlook.
Read more ›Fix Outlook on iPad Sending But Not Receiving Emails
Troubleshoot why the Outlook app on your iPad can send emails but is not receiving incoming messages. Learn how to fix sync, mailbox, and configuration issues.
Read more ›How to Fix TXT Attachments Showing as Chinese Characters in Outlook
Learn how to resolve the issue of TXT email attachments displaying as Chinese characters in Outlook by adjusting text encoding settings to UTF-8.
Read more ›Try what you just learned
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