GRT restore of contacts from Suggested Contacts folder in Exchange 2010 fails with following error in the job log:
0xe00002fd - Cannot restore properties of one or more messages or folders.
Error in SGMON (or beremote debug) on CAS:
 01/06/12 15:30:10 [fsys\mb2] - <<<< RESTORE >>>> Opening folder: Suggested Contacts
 01/06/12 15:30:10 [fsys\mb2] - MsgItem::CloseItem() - EWS extended error: [ErrorInvalidArgument] The e-mail address that was supplied isn't valid.
This issue will come up if email address of the contact has some extra character.
E.g. firstname.lastname@example.org. (a period at the end of the email address)
OR 'email@example.com' (quotes in the email address)
A hotfix is now available for this issue in the current version(s) of the product(s) mentioned in this article. Refer to the Hotfix link under Related Documents at the end of this article to obtain the hotfix needed to resolve the issue.