Exchange 2010 Mailbox Access Security Groups Not Working

Hi Guys,

We have Exchange 2010 SP2 single cas server pretty basic setup.

We have an ongoing issue regarding security groups being able to access mailboxes, basically this feature does not work or it works intermittently.

For example if we add by a active directory user and not security group the end user always gets access to the mailbox automatically through outlook.

However if we add security groups alot of the time it will not work and says the user does not have permission.
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Will SzymkowskiSenior Solution ArchitectCommented:
When you add a user directly on ANYTHING folder/mailbox/file etc access to this is instant. When you add a user to a Group which have ACL's applied to a mailbox/folder/file etc the ACL's need to propogate. This is also delayed if your a user in a different AD site which means that changes need to replicate between site (inter-site replicaiton) which default is 1 hour and a minimal replicaion internal of 15 minutes.

Depending where the user is located and if replication is complete you can speed up the process by having the user logout and log back in which force the ACL's be to applied.

wannabecraigAuthor Commented:
Hey Will,

This does not seem to be working even if we wait the mentioned period of time.
We have even forced reboots and it still doesnt work.

Anything else we can try?

Simon Butler (Sembee)ConsultantCommented:
" Exchange 2010 SP2 "

Exchange 2010 SP2 is no longer supported. Therefore the first thing I would do is upgrade the server to Exchange 2010 SP3, with the latest rollup.

The automatic mapping does not work on groups - only individuals. So the mailbox failing to appear in Outlook is to be expected.

Do you have multiple domain controllers? If you look at the permissions later, have they stuck, or been removed?

wannabecraigAuthor Commented:
Nice answers guys.

Good to know about mailbox mapping V groups.

We have 2 X DC and one site at the moment.

Sembee even when we manually map it, it fails, I would not be surprised if it was some kind of a permission issue like you hint at.

Regarding SP3 we cannot upgrade yet as we are a 24/7 enviroment, until we get some more stuff done on the infrastructure we cannot be installing patches for now.
Simon Butler (Sembee)ConsultantCommented:
Exchange 2010 SP3 has been available for over two years - if you are a 24/7 environment then you need to have high availability in place to be able to patch. Not patching servers these days isn't really acceptable for most businesses as it puts you at risk of being compromised and if you are in any kind of audited environment, or work with audited companies it will cause you to fail the audit.


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