If that message has an attachment that's larger than 20MB, delete the attachment and either attach a smaller file or attach a link to the attachment. For more information, go to Reduce attachment size to send large files with Outlook or Exchange Online limits. For more information, go to Reduce attachment size to send large files with Outlook. I deleted the Yahoo and Google accounts from Outlook and set it up again and that didn't fix anythin


In this scenario, when you try to add your Exchange Online email account to Outlook, the Modern authentication prompt goes blank after you enter your Exchange Online credentials. Therefore, you can't proceed to add the account to your default Outlook profile. This article contains information about how to troubleshoot problems that affect the ability to sign in to Microsoft Office 2016 apps and Microsoft Office 2013 apps that are enabled for modern authentication. This article also contains resources for IT administrators to address reports about Active Directory Federation Services (AD FS) issues that are specific to Office for Windows platforms. For convenience and time sake, I usually just disable modern auth in the registry and then I get the older Windows Security login box and the user put's in the password and the issue is resolved. Similar to Mac Mail, UO email accounts set up in iOS Mail application prior to the Modern Auth update will continue to work provided the device is running iOS 11 or newe


I uninstalled the New Outlook app and reinstalled it and that didn't fix anything. I am fairly sure it is something in my Microsoft account since all 4 of my Windows computers stopped working for the email at the same time. I have another Windows computer with a different Microsoft account and that is working fin


Outlook is working on my phone, and I can access everything via the office.com web site. Now I am constantly being asked to enter passwords for two of my Comcast addresses (my Gmail address works fine). Searched till my fingers bled; gave up and installed the free "Windows Outlook", but it was a mess that I can't take. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical suppor


If you found the Mapi32.dll file damaged or corrupt, there's a probability that you can receive the error following error message when you try sending or receive messages in Outlook. Please make a note that the steps required to follow for creating a new personal folder .pst file may vary according to the version of Outlook you are using. If one SMTP address in a distribution list is corrupted or incorrectly formed, error 0x b can occur. You should examine all email addresses in the distribution list to make sure that they are correct. Additionally, you can send individual test email messages to each distribution list member to identify invalid email addresses. For resolving this issue, you need to run the MAPI repair tool which is a (Fixmapi.exe


For more information, please go to Sync to manually check for new mail and to send messages in Outlook. Sometimes, an Outlook add-in will crash and prevent your email messages from sending. To disable all add-ins, you can start Outlook in safe mode. If you can send email while Outlook is in safe mode, creating a new Outlook email profile should allow you to send email again. For many types of email accounts, classic Outlook stores your messages in a Personal Folders File (.pst file). You can repair this file by running the Inbox Repair Too


Let’s find out what you can do if updates are not installed automatically, and what factors can cause update issues. Check POP3 and SMTP settings for connecting to Microsoft mail servers (addresses of servers, ports, encryption, authentication). Always define a recovery email address when configuring your Office 365 account. If an incorrect password is entered multiple times, after several unsuccessful login attempts, your Office 365 account will be locke


Therefore, you can locate the original files at their primary SharePoint site and restore them Troubleshoot Office 365 Sync and Login Issues from there. You can disable Add-Ins on launch by pressing CTRL and hitting the Microsoft Office app shortcut. In this case, consider using safe mode, which is useful for Office 365 troubleshooting. If your Office 365 subscription has expired, buy a new license and extend your subscription for a new perio


You Troubleshoot Office 365 Sync and Login Issues can unintentionally send an important Microsoft 365 item to the recycle bin, especially if you have too many files on your device’s hard drive. Still, the files you send to the recycle bin are not permanently removed. File and storage issues with Microsoft Office 365 are more serious than other issues. They are not merely inconvenient and slow down work but can also lead to critical data loss. The good news is that the majority of problems can easily be solved on the client’s side. If you use Microsoft Office 365 Outlook as a standalone email client, and you cannot send and receive email messages, check the Outlook connection setting