Forum Discussion
Shared M365 calendar not refreshing in a second M365 account - any suggestions?
Hi Karen_Curtis,
Per https://support.microsoft.com/en-us/office/calendar-sharing-in-microsoft-365-b576ecc3-0945-4d75-85f1-5efafb8a37b4:
Instant syncing for sharing outside your tenant isn't supported currently. While you can share in these configurations, syncing will happen periodically. There are two types of cross-tenant sharing:
Microsoft 365 to another Microsoft 365 user (if external sharing is enabled).
A full shared calendar is created, but the sync will happen approximately every three hours. Instant syncing will eventually be enabled for this setup.
Microsoft 365 to an Outlook.com user. If external sharing is disabled, sharing to another Microsoft 365 user also falls into this group.
An ICS URL is generated when sharing, which the recipient can use to add to any calendar service. With an ICS subscription, the recipient’s calendar service chooses when to sync the ICS subscription to receive new updates. If the recipient is an Outlook.com or an Microsoft 365 user, the sync will happen approximately every three hours.
Hi Karen_Curtis,
Per https://support.microsoft.com/en-us/office/calendar-sharing-in-microsoft-365-b576ecc3-0945-4d75-85f1-5efafb8a37b4:
Instant syncing for sharing outside your tenant isn't supported currently. While you can share in these configurations, syncing will happen periodically. There are two types of cross-tenant sharing:
Microsoft 365 to another Microsoft 365 user (if external sharing is enabled).
A full shared calendar is created, but the sync will happen approximately every three hours. Instant syncing will eventually be enabled for this setup.
Microsoft 365 to an Outlook.com user. If external sharing is disabled, sharing to another Microsoft 365 user also falls into this group.
An ICS URL is generated when sharing, which the recipient can use to add to any calendar service. With an ICS subscription, the recipient’s calendar service chooses when to sync the ICS subscription to receive new updates. If the recipient is an Outlook.com or an Microsoft 365 user, the sync will happen approximately every three hours.
