Calendar sharing policies Exchange Online

Question

Calendar sharing policies Exchange Online

adv_kd 135

Hi,
I want to create policies to allow / deny users to share their calendars in Outlook. Exchange is fully cloud. I don't get it how exactly does it work. Our settings from Admin Center looks like this:

And if I'll stop here it's fine. All users can share their free/busy information to anyone, simple. But if I go deep into sharing policies it gets weird.
I created one sharing policy like this:

And the thing is that I can share my calendar with users in our test environment - marked as "works", I can share calendar with users in domain marked as "1" but I can't share it with users in domain "2" and "gmail.com".

I just need a simple explanation how to configure this settings in two scenarios:

Deny EVERY user to share their calendar with anyone and allow only certain domains for every user
Deny EVERY user to share their calendar with anyone and allow only certain USERS to share their calendar to certain domain
Please help...

Jarvis Sun-MSFT 10,231 Reputation points Microsoft External Staff

2024-02-05T09:14:26.5133333+00:00

@adv_kd , Hi, I'm here to confirm with you if your issue has been resolved. If the problem is successfully solved, you can share your solution and mark them or the helpful reply as answer, this will make answer searching in the forum easier and be beneficial to other community members as well.

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Jarvis Sun-MSFT 10,231 Reputation points Microsoft External Staff

2024-02-05T09:14:26.5133333+00:00

@adv_kd , Hi, I'm here to confirm with you if your issue has been resolved. If the problem is successfully solved, you can share your solution and mark them or the helpful reply as answer, this will make answer searching in the forum easier and be beneficial to other community members as well.

Answer 1

Vasil Michev 119.9K MVP Volunteer Moderator

Organization relationships are "company-wide" and only apply when sharing between two organizations using Exchange Online, or Exchange on-premises. Well, you can scope them down to a group, but in your scenario, sharing policies are a better option.

Create a sharing policy with the domains in #1, and another sharing policy with the domains in #2. For both policies, remove the "sharing with everyone" rule, and optionally, the Anonymous one (this is for Calendar "publishing"). Then, assign the policies to the relevant set of users. The users who would be allowed to share only with domains in #2 get policy #2 assigned, and so on.

adv_kd 135 Reputation points

2024-02-07T07:15:14.37+00:00

Hello,
@Vasil Michev thank you for your answer, I have few more questions.
I don't quite understand when I should use "Organization sharing / organization relationship". This is company-wide so if I specify certain domain - all my users will be able to share their calendar with users in target domain? This is what I am looking for right now, to allow to share their busy/free time with only domains we allow.

Can you describe in more details how to set this scenario? To allow users in company to share their free/busy time ONLY with specified domains. Applied to ALL users.
I've did some changes with organization sharing and individual sharing but it doesn't work quite as I expected it to be.
Vasil Michev 119.9K Reputation points MVP Volunteer Moderator

2024-02-07T07:58:29.8266667+00:00

Org relationships can only be set up between organizations using Exchange, and will not work for gmail.com (which you have listed on one of the screenshots above), outlook.com, and any company not using O365/Exchange on-premises. And it is usually something you configure in conjunction with admins on the other side. End users usually don't have a say in the process, and might not even be aware that their availability can be seen outside of the organization.

Which brings me to the biggest difference in the end user experience - if you actually want to share the calendar (i.e. for the other side to be able to "add" the calendar within their Outlook), org relationships are not going to work. They only allow free/busy lookups (i.e. visibility of availability info within the Scheduling Assistant). In contrast if you "share" a Calendar, as allowed by a Sharing policy, the user will be able to see it directly under the Calendar pane in Outlook.
adv_kd 135 Reputation points

2024-02-07T12:19:06.4666667+00:00

@Vasil Michev Got it! Thank you very much, it explains a lot to me now. :)
So actually I need to use org relationship, both orgs use Exchange Online.

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Calendar sharing policies Exchange Online

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