Personal Exchange calendar not showing in iOS Calendar app

Question

Personal Exchange calendar not showing in iOS Calendar app

con_j 10

I'm trying to add my work Microsoft email to my apple calendar. I can add it as an exchange account and I'm able to sign in and the account shows up. It's loading in my email and contacts just fine.

The issue I'm having is that only other people's calendars that are shared with me are showing up in the IOS Calendar app. My calendar isn't showing up at all even though I the box checked for it to show up.

I've tried deleting my calendar and re-adding it several times and I've adjusted the sync settings so it's syncing as often as possible but I still can't get my calendar to show up.

Is there anything else I can try?

Jim Stavropoulos 5 Reputation points

2025-11-14T02:45:55.18+00:00

I too am having the same issues that commenced on Tuesday Nov 11th, 2025. I have one users mailbox on a corporate (work) Microsoft 365 exchange mailbox. The end user device(s) that I have tested have been iOS 18x and iOS 26.x. I've test on 4 devices. Just the calendar does not sync at all. Contacts sync fine, Inbox mostly syncs well, but the push does not always work. Once you view the inbox or refresh it, then the emails come in.
If i use Microsoft Outlook for iOS on the same device, Activesync works perfectly. Just not the native iOS calendar app. All the devices have the latest version of iOS (18.x or 26.x). I've remove the complete mailbox from the iOS device, removed it from the exchange account using OWA or the Exchange admin tool, restarted the iPhone and then added the mailbox back and it has not worked. I've done this at least 4 times. I reported it to Microsoft on Tuesday 11/11/25 but have not had an adequate or satisfactory response, on the suggestion to perform the steps above. Today is day 3 with this issue. I suspect it's a wider issue an not just the one mailbox on my server. I'm commencing further testing and now searching the web to see if other people are having the same issue. I've see something like this in the past when Apple and Microsoft are using different security standards and we had to wait for Apple to resolve the issue. I don't think the above information will help you other than validate that others are having the same problem at this current time with iOS calendar and MS365 exchange mailbox.
CC 6 Reputation points

2025-11-15T00:33:18.4333333+00:00

It sounds like we’re encountering a similar or same issue. Our Microsoft Exchange work calendar isn’t appearing in the iOS Calendar app. We have several personal iOS devices enrolled in Intune, and the problem appears to only occurring on devices running iOS 26.x.x.
Lia V 6,530 Reputation points Microsoft External Staff Moderator

2025-11-19T15:46:51.2+00:00

Hello @Jim Stavropoulos, @CC,

We’re seeing multiple reports that Exchange calendars are not showing up in the native iOS Calendar app. To help Microsoft prioritize and address this issue:

1/ Please submit feedback through the Microsoft 365 Feedback Hub

2/ (For admins) Report the problem in the Microsoft 365 Admin Center

Your input will help raise visibility and drive a timely resolution. Thank you for your support and cooperation.
Jim Stavropoulos 5 Reputation points

2025-11-19T20:11:10.7633333+00:00

I resolved my issue with a second call to microsoft support. I had the technician run a tool to look for corruption on the mailbox calendar. That solved the issue. THe calendar did have over 50,000 entries but I did not reduce the amount of entries to get it to work. It was a corruption issue and I did not have the tools or knowledge to run a power shell command to look for corruption. As soon as to corruption scan was done the problem was solved. All other pairing/unpairing/activesync/etc failed to fix the problem. I performed all of the recommended actions.

3 answers

Your answer

Jim Stavropoulos 5 Reputation points

2025-11-14T02:45:55.18+00:00

I too am having the same issues that commenced on Tuesday Nov 11th, 2025. I have one users mailbox on a corporate (work) Microsoft 365 exchange mailbox. The end user device(s) that I have tested have been iOS 18x and iOS 26.x. I've test on 4 devices. Just the calendar does not sync at all. Contacts sync fine, Inbox mostly syncs well, but the push does not always work. Once you view the inbox or refresh it, then the emails come in.
If i use Microsoft Outlook for iOS on the same device, Activesync works perfectly. Just not the native iOS calendar app. All the devices have the latest version of iOS (18.x or 26.x). I've remove the complete mailbox from the iOS device, removed it from the exchange account using OWA or the Exchange admin tool, restarted the iPhone and then added the mailbox back and it has not worked. I've done this at least 4 times. I reported it to Microsoft on Tuesday 11/11/25 but have not had an adequate or satisfactory response, on the suggestion to perform the steps above. Today is day 3 with this issue. I suspect it's a wider issue an not just the one mailbox on my server. I'm commencing further testing and now searching the web to see if other people are having the same issue. I've see something like this in the past when Apple and Microsoft are using different security standards and we had to wait for Apple to resolve the issue. I don't think the above information will help you other than validate that others are having the same problem at this current time with iOS calendar and MS365 exchange mailbox.
CC 6 Reputation points

2025-11-15T00:33:18.4333333+00:00

It sounds like we’re encountering a similar or same issue. Our Microsoft Exchange work calendar isn’t appearing in the iOS Calendar app. We have several personal iOS devices enrolled in Intune, and the problem appears to only occurring on devices running iOS 26.x.x.
Lia V 6,530 Reputation points Microsoft External Staff Moderator

2025-11-19T15:46:51.2+00:00

Hello @Jim Stavropoulos, @CC,

We’re seeing multiple reports that Exchange calendars are not showing up in the native iOS Calendar app. To help Microsoft prioritize and address this issue:

1/ Please submit feedback through the Microsoft 365 Feedback Hub

2/ (For admins) Report the problem in the Microsoft 365 Admin Center

Your input will help raise visibility and drive a timely resolution. Thank you for your support and cooperation.
Jim Stavropoulos 5 Reputation points

2025-11-19T20:11:10.7633333+00:00

I resolved my issue with a second call to microsoft support. I had the technician run a tool to look for corruption on the mailbox calendar. That solved the issue. THe calendar did have over 50,000 entries but I did not reduce the amount of entries to get it to work. It was a corruption issue and I did not have the tools or knowledge to run a power shell command to look for corruption. As soon as to corruption scan was done the problem was solved. All other pairing/unpairing/activesync/etc failed to fix the problem. I performed all of the recommended actions.

Answer 1

Jim Stavropoulos 5

I resolved my issue with a second call to microsoft support. I had the technician run a tool to look for corruption on the mailbox calendar. That solved the issue. THe calendar did have over 50,000 entries but I did not reduce the amount of entries to get it to work. It was a corruption issue and I did not have the tools or knowledge to run a power shell command to look for corruption. As soon as to corruption scan was done the problem was solved. All other pairing/unpairing/activesync/etc failed to fix the problem. I performed all of the recommended actions.

0 comments

Answer 2

Hi @con_j,

Welcome to the Microsoft Q&A forum.

Thank you for reaching out regarding the issue with your work calendar not appearing in the iOS Calendar app. I understand how important it is to have your calendar accessible across devices.

Based on what you described, your account is successfully added as an Exchange account, and email and contacts are syncing correctly. However, your primary calendar is not showing, even though shared calendars appear. This usually happens due to how iOS handles Exchange ActiveSync or certain visibility settings.

Below are some steps you can try:

Check calendar visibility:

Go to Setting > App > Calendar > Calendar Accounts and confirm your work calendar is listed.

Set Outlook as your default calendar:

To set Outlook as your default calendar, please see: Change your Calendar settings on iPhone - Apple Support , at the "Choose a default calendar" section.

Remove and re-add the account:

Delete the Exchange account from your device, then re-add it. Make sure Mail, Contacts, and Calendars are all enabled during setup. For reference: Set up Exchange ActiveSync on your iPhone, iPad, or Apple Vision Pro - Apple Support

Note: Microsoft is providing this information as a convenience to you. The site is not controlled by Microsoft. Microsoft cannot make any representations regarding the quality, safety, or suitability of any software or information found there. Please make sure that you completely understand the risk before retrieving any suggestions from the above links.

Additionally, if your account is managed by an organization, it may be helpful to check with your IT team to ensure there are no policies in place that restrict calendar sync on mobile devices.

Once you’ve had a chance to try these steps, could you also let me know:

If your email account is part of your company’s Microsoft 365 subscription or a personal Outlook account?
What iOS version your device is running? Older versions sometimes have sync issues.

Your answers will help us ensure we’re applying the correct troubleshooting approach. If the issue persists after these steps, please let me know and we can explore additional options together.

Thank you for your patience and understanding. If you have any questions, please feel free to reach out.

I'm looking forward to your reply.

If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

Lia V 6,530 Reputation points Microsoft External Staff Moderator

2025-11-12T22:52:35.6133333+00:00

Hi @con_j,

I hope everything is going well on your end.

May I kindly ask if you’ve had an opportunity to review my response? I’m following up on the support thread we’ve been working through together and wanted to ensure everything is on track.

If you're still experiencing any issues or have further questions, please feel free to reach out at any time. I’m always happy to help if you need anything else.

We want to ensure everything is functioning smoothly and that your experience remains seamless.

Thank you again for your collaboration throughout the troubleshooting process.

I look forward to hearing from you soon.

Answer 3

AI answer

It sounds like you are experiencing an issue with your personal Exchange calendar not syncing properly with the iOS Calendar app. Here are a few steps you can try to resolve the issue:

Check ActiveSync Relationship: Ensure that the ActiveSync relationship between your mobile device and Exchange Online is functioning correctly. You might need to remove and then re-create this relationship. This can sometimes resolve syncing issues.
Sync Settings: Double-check your sync settings on the iOS device. Make sure that calendar syncing is enabled and set to sync as frequently as possible.
Remove and Re-add Account: If you haven't already, try removing your Exchange account from the iOS device and then re-adding it. This can sometimes help in refreshing the connection and resolving sync issues.
Disable Add-ins: If you are using any Outlook add-ins that might affect calendar items, consider disabling them temporarily to see if that resolves the issue.
Restart Device: Sometimes, simply restarting your iOS device can help clear up any temporary glitches that might be affecting the calendar sync.

If these steps do not resolve the issue, you may want to check for any updates for the iOS Calendar app or reach out to Microsoft support for further assistance.

References:

Calendar on mobile device isn't synced to the calendar in an Exchange Online mailbox when you use Exchange ActiveSync

AI-generated content may be incorrect. Read our transparency notes for more information.

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Personal Exchange calendar not showing in iOS Calendar app

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