From 7c0a4959d1716ef22b391bb2c7f14b8679f412d3 Mon Sep 17 00:00:00 2001 From: Marcella Majors Date: Fri, 30 Jan 2026 08:50:36 +0000 Subject: [PATCH] Update 'Fixes or workarounds for recent issues on Outlook com' --- ...rounds-for-recent-issues-on-Outlook-com.md | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) create mode 100644 Fixes-or-workarounds-for-recent-issues-on-Outlook-com.md diff --git a/Fixes-or-workarounds-for-recent-issues-on-Outlook-com.md b/Fixes-or-workarounds-for-recent-issues-on-Outlook-com.md new file mode 100644 index 0000000..66ac5c0 --- /dev/null +++ b/Fixes-or-workarounds-for-recent-issues-on-Outlook-com.md @@ -0,0 +1,19 @@ +This happens to accounts that are configured in the iOS Mail app. The loading of unregistered MAPI services has been disabled by default to make Outlook more secure. To access the calendar shared with your Microsoft 365 for business account, you'll need to accept the invitation from Outlook on the web, iOS, or Android. If you've already clicked the Accept button in Outlook 2016, you won't be able to re-accept the invitation from another Outlook application. The person who sent you the invitation will need to remove your permissions and then send a new invitation. If you typically use an Outlook.com account for email, this issue can occur if there are multiple aliases on the account and the 3rd party email address is the primary alias. + +If Outlook is configured to connect to the Exchange mailbox in Online mode, an .ost file is not used. To adjust the number of days of data that are synced for shared folders, add the following registry values. You can limit the synchronization window that’s used for calendar folders to reduce the number of items that are stored locally in your calendar folders. + +You'll need to acquire a recovery tool designed for bigger jobs. Search "PST Repair Tool" and you'll find many reputable programs who know how to fix troubleshooting Outlook startup issues this Outlook issue. Clear unnecessary files from outbox and trash folder to optimize the performance of your Outlook application. Also, try to use the necessary Outlook features to enhance the performance of Outlook as well as Windows. When you reinstall Outlook, you are removing the current application from your system and then installing it again. + +Running the /resetnavpane command removes all customizations to the navigation pane. You can determine if it's corrupted by creating a new profile and changing which profile is used when Outlook starts. 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. Customers using the contact support buttons at the foot of the support pages, or the "email us" links in support Virtual [troubleshooting Outlook startup issues](https://office365emailfix.blogspot.com/2025/10/fix-outlook-not-sending-or-receiving.html) Agent, are unable to open the Help Pane. + +Things changed on February 1st, 2024 when Google and Yahoo started applying new email sender standards in an attempt to improve their users’ experience. Even with the correct SMTP details, the server might be down or malfunctioning. Understanding the specific error codes returned by the SMTP server can help diagnose the issue. Mistyped usernames or passwords can prevent successful authentication with your SMTP server, leading to failed email sends. To edit a shared calendar, go online to your own Outlook.com calendar, open Calendar for Windows 10, or use a mobile device. Read how to Add your Outlook.com account to another mail app. + +One of the failed sign-in windows showed a long string under a field labeled Microsoft Information Protection API. Running that value through the Entra admin portal revealed what we needed. At that point, the focus shifted to what was happening during authentication. The answer came from a closer look at the Microsoft Entra sign-in logs and a hidden dependency that I wasn’t aware of. + +Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. We love reading your suggestions on new features and feedback about how you use our products! To learn more about how to share your feedback, see How do I give feedback on Microsoft Office. Set up your account manually as an IMAP or POP account in Outlook. + +We have recently received some reports of users who are experiencing issues with subscribing to .ics/ical calendars. To help you get rid of these duplicates, we have released a fix which will automatically clean up your contact list. This fix will clean up duplicate contacts for end users starting August 9, 2023. + +When you enable this option, calendar actions are sent directly to the server instead of having to be synchronized from local storage. To fix performance issues that affect your Calendar, try the following methods. Also, determine whether any local network issues might be causing the problem. This includes issues that affect your local proxy server, firewall, or Internet service provider. Outlook uses an .ost file only if the Exchange email account is configured to use Cached Exchange Mode. + +For example, writing gamil.com instead of gmail.com is a common typo that will cause problems with delivery. If you manually type in the secondary connected account email address in the "From" field, the email is sent as "On behalf of" your primary Outlook.com account. Refer to our comprehensive list of common SMTP settings or consult your email provider for the correct parameters. Incorrect SMTP parameters are a frequent cause of email sending issues. Your email client needs the correct settings to communicate with the SMTP server. To access the calendar troubleshooting Outlook startup issues shared with your Microsoft 365 for business account, you'll need to accept the invitation from Outlook on the web, iOS, or Android. \ No newline at end of file