Short answer: Yes it's different depending on the version of Exchange and the version of the TDP.
Longer answer: With old versions of Exchange and TDP, doing only legacy backups, you only had the TDP client and a TDP scheduler service. Starting with Exchange 2010, you can no longer do Legacy backups, you are *required* to do VSS backups. If you do VSS backups, you have the admin account and dsmcad involved, and dsmcad takes on the function of being the VSS requestor (in addition to its roles as webclient-server-upper and managed-services-scheduler-manager). (It's not going to make sense from the server side, you would have to see how it is installed on the client side to know.) And starting with Exchange 2010, most sites us DAG databases, which is different than storage groups in Exchange 2007. When you do DAG DB's, it is to your advantage to use proxy nodes so that all the filespaces are lodged under one TSM nodename. That prevents you from getting multiple copies of backups when DB's fail back and forth between Exchange servers, which is what 2010-2013 DAGs are designed to do. Also lets you restore any DB to any Exchange server. So stuff changes depending on whether you are using a V5 TDP with Ex 2007 Legacy, V5 TDP with Ex 2007 VSS, V6 TDP with Ex2007 legacy, V6 TDP with EX2007 VSS, EX2010 with VSS ,EX2010 with VSS and DAGs and Proxies Oh My. Some of it is change in the TDP structure, some of it due to change in Exchange structure, some of it due to TDP changes made to handle the new Exchange features. (And I also don't know why sometimes the Exchange TDP reports as MSExchange and sometimes as WinNT. It's annoying and not consistent, and doesn't seem to have a Why). W -----Original Message----- From: ADSM: Dist Stor Manager [mailto:[email protected]] On Behalf Of Geoff Gill Sent: Wednesday, May 14, 2014 10:54 AM To: [email protected] Subject: [ADSM-L] Exchange backups Looking for some Exchange knowledge. Last week admin ID's for nodes were being removed and it was discovered 2 days later that this broke the Exchange backups. Once they were put back backups started working again but what confuses me is when comparing 2 different sites things seems to work differently as it relates to Exchange. I have no access to the client side, only the TSM server, so I can't relay anything except what I see here. At one site the nodes are set up just like any other node it looks like. Licensing shows 2 Exchange TDP in use but when looking at q no the platform shows WinNt. These nodes do NOT have an associated admin ID that I can find and backups work just fine. Why things report the way they do I don't understand. The second site licensing shows 6 Exchange TDP in use and q no on these show the Platform as TDP MSExchg. These nodes are also configured with Proxynode Agents too whereas the first site is not. Why this I don't understand either. Since I don't know much about Exchange backups in general I would have assumed based on the first site this would be the normal way they would be set up. This second site is the one that Exchange backups stopped working when the Admin ID's were deleted. I put everything back and backups work now but when looking at the admin ID's it seems as though only one of them shows Days Since Last Access 1 so I don't know if removing the others would break this again or not. Support told me these Admin ID's need to be there for Exchange to work but this doesn't seem to be the case at the site that works where are no admin ID's there are not associated with an Exchange node. Hopefully someone has some explanation for this. Thank You Geoff Gill
