In bit of a dilemma, we are running GroupWise 7.03 with around 3,000 users. We currently have a BES with 200 BlackBerry handsets in use which we will be keeping but now have a business requirement to add up to a thousand Windows Mobile 6.1 devices starting in around three or four months time. The dilemma is do I go with GMS and install that despite its uncertain future or try and get BlackBerry Connect to work on the Windows Mobile handsets and just add them to our current infrastructure?

Would having both a BES and a GMS running against our GroupWise system be an issue?