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How will things work when a user's roaming profile from windows 7 machines have to be used on windows 8 machines? Or actually the other way around.

Will this force windows 8 migration just to keep roaming profiles consistent?
Any suggestions on things to avoid problems would be appreciated.

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I actually hadn't tried yet, but I know there will be new machines with windows 8 to deal with coming –  datatoo Jul 13 '13 at 14:03

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up vote 2 down vote accepted

Turns out it's worth being concerned about, or at least prepared.

Luckily there's plenty to get you started (from MS):

Unpredictable behavior if you migrate a roaming user profile from Windows 8 to Windows 7

Couple blurbs from that KB article:

Windows 7 and Windows 8 use similar user profile formats, which do not support interoperability when they roam between computers that are running different versions of Windows. When a user who has a Windows 7 profile signs in to a Windows 8-based computer for the first time, the user profile is updated to the new Windows 8 format. After this occurs, the user profile is no longer compatible with Windows 7-based computers.

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When a user who has a Windows 7 roaming profile signs in to a Windows 8-based computer for the first time, the user's roaming profile is updated to the new Windows 8 format. The Windows 8 user profile format is incompatible with Windows 7-based computers.

If a user must switch between Windows 7-based and Windows 8-based computers, then you must configure the Set roaming profile path for all users logging onto this computer Group Policy setting for the computers.

The full KB (obviously) contains more information and how to deal with it.

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Thanks for great information –  datatoo Jul 14 '13 at 6:10

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