Here are some things to check.On the phones Security Profile is Enable Digest Authentication checked?Make sure that under the phone configuration - Protocol Specific Information, that the user you created is listed as the Digest UserOn the User page ...

The will it be supported questions are always the stickiest.  I'm sure there hasn't been any direct testing of booting a CUBAC from SAN but there really isn't a reason it won't work. TAC should assist the customer in troubleshooting any issues with t...