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Glad I could help. &nbsp;Take care :)
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I have a question on cross forest move if u can answer<br />
<br />
an organization is migrating user mailboxes from exchange 2010 to exchange 2013<br />
<br />
they are using ADMT but they are using FIM as well?<br />
<br />
wont ADMT BE SUFFICIENT
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I have a question on cross forest move if u can answer

an organization is migrating user mailboxes from exchange 2010 to exchange 2013

they are using ADMT but they are using FIM as well?

wont ADMT BE SUFFICIENT

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Yes I have performed a cross-forest Exchange migration using only the ADMT.
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Yes I have performed a cross-forest Exchange migration using only the ADMT.

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but do we require FIM as well?
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if FIM is used by default then why MFG, FIM is just for galsync?<br />
<br />
one of my friends was telling that we are doing migration in cross forest &nbsp;and we are using quest tools along with FIM?<br />
<br />
my only question to u is why they were using FIM &nbsp;FOR ON PREMISE migration
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if FIM is used by default then why MFG, FIM is just for galsync?

one of my friends was telling that we are doing migration in cross forest  and we are using quest tools along with FIM?

my only question to u is why they were using FIM  FOR ON PREMISE migration

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A cross-forest migration is a complex project so I'm hesitant to comment too much on your particular plan, I just know I migrated Exchange 2007 to Exchange 2010 in a new, completely separate forest using only AD MT with no FIM.
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A cross-forest migration is a complex project so I'm hesitant to comment too much on your particular plan, I just know I migrated Exchange 2007 to Exchange 2010 in a new, completely separate forest using only AD MT with no FIM.

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I understand in hybrid migration one needs ADFS for single sign on for both on premise and cloud .<br />
<br />
but I fail to understand why organization relationship is created , Is it a requirement for ADFS also where is the role of Microsoft federation gateway comes into picture here?
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I understand in hybrid migration one needs ADFS for single sign on for both on premise and cloud .

but I fail to understand why organization relationship is created , Is it a requirement for ADFS also where is the role of Microsoft federation gateway comes into picture here?

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Office 365 is a group of software plus services subscriptions that provides productivity software and related services to its subscribers. Office 365 allows the use of Microsoft Office apps on Windows and OS X, provides storage space on Microsoft's cloud storage service OneDrive, and grants 60 Skype minutes per month. Office 365 includes e-mail and social networking services through hosted versions of Exchange Server, Skype for Business Server, SharePoint and Office Online, integration with Yammer, as well as access to the Office software. All of Office 365's components can be managed and configured through an online portal; users can be added manually, imported from a CSV file, or Office 365 can be set up for single sign-on with a local Active Directory using Active Directory Federation Services.