I’m very happy to be able to announce we have just made available for download a guide to help those of you intending to migrate from Exchange in /Hosting mode to Exchange 2010 SP2 installed without use of the /hosting switch.
Like the previous HMC to Exchange 2010 SP2 guidance, it contains a white paper and some PowerShell scripts. The white paper describes the migration process, and the scripts provide a starting point for your own migration toolkit. Of course the exact migration steps and methodology you will need to follow will depend upon what you have deployed, but we hope what we have provided will help you with your efforts and provide you some useful tools and information.
Check out the Migrating From Exchange Server 2010 in Hosting Mode to Exchange Server 2010 SP2 documentation.
We know any cross-forest migration can be tough, and there are also companies out there that provide migration tools and consulting, so if you feel you need more help than the guidance provides, or if you need some form of longer term co-existence, you may want to look at those offerings.
Finally, as discussed several times on this blog, building a multi-tenancy solution is a complex undertaking. We still very much are recommending that you look at existing solutions available in the market today and/or look at engaging solution integration partners to help with your solution. There are several solutions listed on our web site, and more coming, so before trying to re-invent the wheel to build your multi-tenant offering, look at what the market can offer.
Good luck with your migration!
Principal Program Manager (though not as awesome as Ross)
Exchange Customer Experience