Install SP1 in hosting mode on existing environment

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At the moment we have three servers running Exchange 2010;

1; Hub/CAS
2; Mailbox
3; Edge

We want to install SP1 on the mailbox server with the /hosting switch. I've searched the internet, and couldn't find any information about this. Can someone tell me what will happen with the current mailboxes? Are they left alone or should we restore them afterwards? Or should we remove all of the servers and start all over again?

Should sp1 be installed with the hosting switch on every server or just on the mailbox server?

I'm going to test this in a lab environment, but before I begin I want to gather some information.


I installed SP1 on a fully configured Hyper-V machine. Even my pre-defined settings remained. Maybe you can take a snapshot before you start or clone the VM? SP1 is removable via add\remove programs. As far as I know the Beta and RC versions of SP1 only have this possibility to remove it. What I could find is that for Exchange 2007, certifcateproblems occure when a servicepack was installed. Couldn't find anything else at the moment.

If I can assist you, let me know.

Gulab Mallah

First thing /hosted is not supported as if now, until MS comes with BPOS 2.0 (2010 SP1) (BPOS 1.0 )2007
Once you installed the SP1 on the server and want to mount that RTM database on SP1, you will get an error message and you can't mount the database.

Best practice is to upgrade that RTM to SP1 and than move that data to SP1 server.

Gulab | Skype: gulab.mallah

Brian Day MCITP

First thing /hosted is not supported as if now

/Hosted is fully supported.

/Hosted is for hosting providers installing Exchange 2010 locally. This isn't the cross-premise model you're thinking of with Office 365. :)

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