Calendars missing on M365 accounts on Outlook for MacOs (new install)

Question

Calendars missing on M365 accounts on Outlook for MacOs (new install)

Steve Barker 0

Installed a fresh version of MacOs.

After installing a fresh copy of M365 Apps (direct from portal.office.com), I added my Microsoft 365 account to Outlook.

email works fine. - OWA works fine -iOS Outlook works fine.

However, on Outlook for MacOS calendars are missing. The sidebar only shows Birthdays, United Kingdom Holidays, United States Holidays. - no calendar for my account.

I can find no way of adding it.

this occurs across even if I add a second or 3rd M365 account.

MacOS version is Golden Gate 27.0.1

M365 Apps version is 16.113.4

Any ideas?

thanks

Steve Barker 0 Reputation points

2026-10-10T17:54:50.3966667+00:00

Just to confirm. this is a brand new install of the OS and an immediate install of office apps. I don't see the logic in uninstalling office and re-installing again. (by the way, I have already tried a fresh install of both the OS and Office).

I have also not installed any other applications prior to Office other than Edge.

Legacy Outlook does in fact show the calendar. However, as soon as I switch back, it is not visible in 'new' outlook.

New profile has the same issue.

On a previous install on this Mac, this has not been a problem. It only has happened since I wiped and re-installed the OS.

Thanks for the suggestions
Ryan-N 16,135 Reputation points Microsoft External Staff Moderator

2026-10-10T18:11:57.12+00:00

Hi Steve,

Thank you for your response.

Since the issue only occurs in New Outlook for Mac and does not occur when you switch to Legacy Outlook, this suggests that the issue may be related to the current version of New Outlook for Mac rather than your account or a specific setting.

In this case, I recommend contacting Microsoft Technical Support for further investigation. The support team has the necessary tools to examine the application and help identify the underlying cause of the issue.

To create a support ticket with Microsoft Technical Support, you can refer to the following article:

Get support - Microsoft 365 admin | Microsoft Learn

If you have any questions or need further assistance, please feel free to share them in the comments on this post so I can continue to support you.

I look forward to continuing the conversation.

1 answer

Your answer

Steve Barker 0 Reputation points

2026-10-10T17:54:50.3966667+00:00

Just to confirm. this is a brand new install of the OS and an immediate install of office apps. I don't see the logic in uninstalling office and re-installing again. (by the way, I have already tried a fresh install of both the OS and Office).

I have also not installed any other applications prior to Office other than Edge.

Legacy Outlook does in fact show the calendar. However, as soon as I switch back, it is not visible in 'new' outlook.

New profile has the same issue.

On a previous install on this Mac, this has not been a problem. It only has happened since I wiped and re-installed the OS.

Thanks for the suggestions
Ryan-N 16,135 Reputation points Microsoft External Staff Moderator

2026-10-10T18:11:57.12+00:00

Hi Steve,

Thank you for your response.

Since the issue only occurs in New Outlook for Mac and does not occur when you switch to Legacy Outlook, this suggests that the issue may be related to the current version of New Outlook for Mac rather than your account or a specific setting.

In this case, I recommend contacting Microsoft Technical Support for further investigation. The support team has the necessary tools to examine the application and help identify the underlying cause of the issue.

To create a support ticket with Microsoft Technical Support, you can refer to the following article:

Get support - Microsoft 365 admin | Microsoft Learn

If you have any questions or need further assistance, please feel free to share them in the comments on this post so I can continue to support you.

I look forward to continuing the conversation.

Answer 1

Hi Steve,

Welcome to the Microsoft Q&A forum.

Based on your description, your calendar displays and works normally in OWA and Outlook for iOS. However, the calendar does not work properly in New Outlook for Mac.

Please try the following steps:

1/ Uninstall New Outlook for Mac, and then reinstall it.

2/ Please try switching to Legacy Outlook to check whether the issue also occurs there:

Click Outlook > Legacy Outlook.

3/ Create a new Outlook profile.

You can refer to the following documentation for instructions on how to create a new profile:

Manage profiles or identities in Outlook for Mac | Microsoft Support

4/ If you have another macOS device available, please check whether the issue also occurs on that device or only on your current device.

If you have any updates regarding this issue, please feel free to share them with me. I will continue to assist you.

If the answer is helpful, please click "Yes" and kindly upvote it.

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