Ronnie, You'll not be able to install both versions on the same server - and you may have to box clever if you've enabled roaming profiles. Also bear in mind the file format has changed as well; so you may need to ensure that either you've a way of forcing the 2010 to save in an older format; or allow the existing environment to be able to read the newer file format. To run on the same server you'll have to introduce application streaming to allow you to at least launch Office 2010. Bear in mind it'll get exciting with selecting documents in explorer or launch documents from and linking applications - this may be a lot of work and change for a looksee. Perhaps the easier method would be to build a new server with Office 2010 and set up this with a bunch of test user accounts - could have less impact on your existing environment and be easier to evaluate. From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of Hamilton, Ronnie Sent: 28 March 2011 14:37 To: thin@xxxxxxxxxxxxx Subject: [THIN] Office 2010 Hi, just been asked to check out Office 2010 for XenApp, I would need to still run Office 2002 at the same time. Is this a good / bad idea ? Has anyone had any good experiences >? The Platform is Windows 2003 running XenApp 5. thanks Ronnie Visit our website : www.ltai.ie __________________________________________ Lufthansa Technik Airmotive Ireland Limited. Registered in Ireland. Reg. No. 45999. Registered Office: Naas Road, Rathcoole, Co.Dublin. Lufthansa Technik Airmotive Ireland Leasing Limited. Registered in Ireland. Reg. No. 140891. Registered Office: Naas Road, Rathcoole, Co.Dublin. __________________________________________ The information in this email and in any attachments is confidential and may be privileged. If you are not the intended recipient, please destroy this message, delete any copies held on your systems and notify the sender by return email. You should not read, retain, copy, disseminate, distribute, disclose or use this email or its contents in any way. Any such action is strictly prohibited. Thank you.