Migration questions

[Peepo]

We initially had an exchange 5.5 environment with 2 exchange 5.5 servers in the organisation/site. We recently added Exchange 2003 into the organisation. This consists of an Exchange 2003 standard server for the SRS service and a pair of clustered Exchange 2003 Enterprise servers. (We had to have the separate server for SRS because you cannot install the SRS service on a cluster).
We have the servers communicating with each other and working OK.
Due to the way we are migrating our users, it is likely that it will take around 2 years before all the mailboxes etc. are migrated to Exchange 2003.
We have been informed that it is not recommended to have this co-existence in place for longer than a few weeks! Can anyone advise on this? Are we taking a massive risk in taking 2 years to migrate everything?

Your help is much appreciated.

Rob.

 

[znetbiz]

During your coexistance period you will need to run both the SRS and ADC. These tools were created to assist the migration, but are not built to run for long periods of time. Why is your migration going to take so long?

 

[Peepo]

The reason why the migration is going to take so long is that we are doing it in conjunction with a 4000 desktop PC replacement program.
Does anybody have experience of using the ADC/SRS over a long period of time?