How to Share ALL Calendars Externally with other Tenancy

Question

Hello,

As the Global administrator, I have set up external calendar sharing for a separate tenancy. They are also set up with B2B connection too, but they still cannot view our calendars within Outlook. I have taken all of the measures below for sharing.

email invitation --> Show all calendar appointment information
Exchange Admin Center --> Organization --> Sharing --> Individual Sharing --> set up a policy for certain domains --> Share your calendar folder --> All calendar appointment information, including time, subject, location and title

Exchange Admin Center --> Organization --> Sharing --> Organisation Sharing --> Add Organisation Relationship

Admin Portal --> Settings --> OrgSettings --> Calendar --> Allow anyone to access calendars with an email invitation --> Show all calendar appointment information

Admin Portal --> Settings --> OrgSettings --> Calendar --> Let your users share their calendars with people outside of the organisation who have Office 365 or Exchange

Should this not allow users from the other tenancy to open and view our calendars? I am under the impression that this org sharing feature allows users to see our calendars without us sending them an invite? I have waited around 10 days for these settings to take affect but I now am struggling.

Sam.

Answer 1

Hi @Sam Brewin ，

Should this not allow users from the other tenancy to open and view our calendars? I am under the impression that this org sharing feature allows users to see our calendars without us sending them an invite?

The result of the Org Sharing between two tenants is that users in one organization will be able to view the availability of the other tenant's users when scheduling meetings. See the documentation below for more details:
Organization relationships in Exchange Online

If you need to allow users from the other tenant to open and view the calendar in the calendar list within Outlook, agree with Vasil that it's inevitable for the calendar owner to send a sharing invitation via email.

---

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.

Answer 2

If you want users to "add" the calendar in their Outlook, you cannot avoid using invites. Otherwise you're limited to seeing the free/busy information within scheduling assistant and similar controls.

Answer 3

Muy interesante