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Time needed to migrate from Exchange 2003 to Exchange 2008?

We are going to be migrating from an Exchange 2003 server, with about 65 GB of databases, to a new Exchange 2008 server.

How much time do you think is needed?
We are trying to get accurate quotes (as accurate as possible), but the time effort from our vendors differs greatly. Thanks!
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1 Solution
Jian An LimSolutions ArchitectCommented:
This question will not get any good answer without any more input.

I try my best to answer this.

you have a few consideration.

network / file transfer
1. What type of switch you are using ? 1G or 100MB? half duplex or full duplex?
2. What type of harddisk you are using? (SATA, IDE, or SCSI)

exchange migration
1. have you done one before? if not have you read through the document?

For a quotation, if you really know your exchange well, you can finish up the setup within 8 hours (including testing). setup the hardware, install exchange 2007 std, install windowsupdate, test migrate a few mailbox to test it. Then at the weekend, you can just kick in the transfer through the night.

So for me, I can finish it up with 20 hours... but you always want to give yourself a bit more if things goes wrong.

Jian An LimSolutions ArchitectCommented:
of course, your vendor might come out different type of design of exchange. have you consider High availability? how many users are we talking about?

If you can provide the hours for each different vendors .. maybe there is an explanation for it.

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