Exchange 2010 SP2 upgrade problemi ( DiscoveryMailbox )

Geçenlerde sistemlerim de Exchange 2010 SP1'den Service Pack2 upgrade işlemi planlamıştım. Upgrade aşamasında HUB ve CAS sunucular sorunsuz SP2 upgrade i olurken Mailbox Role sunucular da aşağıda ki hatayı aldım. DiscoverySearch mailbox ve Discovery Management grubu ile ilgili hata veriyordu ve kontrol ettiğimde Discovery Search mailbox'ı zaten sistemde vardı ve hatta sürekli kullandığım bir servisti.

Couldn’t resolve the user or group “bugra.com/Microsoft Exchange Security Groups/Discovery Management.”
It is also listed in the eventlog at Event id: 1002: Exchange Server component Mailbox Role failed:
Event ID 1002
Providor Name:MSExchangeSeup

“Couldn’t resolve the user or group /Microsoft Exchange Security Groups/ Discovery Management” If the user or group is a foreign forest principal, you must have either a two-way trust or an outgoing trust.
The trust relationship between the primary domain and the trusted domain failed”
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Active Directory kaynaklı bir problem olduğunu düşündüm. Çözüm için aşağıda ki işlemleri yapabilirsiniz.

1) Disable-Mailbox “DiscoverySearchMailbox {D919BA05-46A6-415f-80AD-7E09334BB852}”
2) Enable-Mailbox “DiscoverySearchMailbox {D919BA05-46A6-415f-80AD-7E09334BB852}” -Arbitration
3) Add-MailboxPermission -Identity:"bugra.com/Users/DiscoverySearchMailbox {D919BA05-46A6-415f-80AD-7E09334BB852}” -User:”Discovery Management” -AccessRights:”FullAccess”