I have a Kerio Connect groupware solution hosted on a Windows 7 Professional.
The services it does includes:
and many others.
It is running on VM with 4 dedicated cores and 8 GB of RAM and I have found that it does not always answers client petitions.
Now, it seems Windows 7 has a connection limit set for printing, file sharing, ICS, and some other services, but it does not seem to have issues if I put another solution on it. Does anyone knows if this is a problem?