question re: re-enabling cached exchange mode


R

RAM

I've scanned this group for posts regarding cached exchange mode and
OST files, but haven't found the information I need.

I need to know the impact of re-enabling cached exchange mode and NOT
removing any old OST files.

Scenario:
User works with Outlook (2003 or 2007) in cached exchange mode for a
period of time. Then, for whatever reason, cached exchange mode is
disabled.

The OST file is NOT deleted or renamed.

After some time (months maybe), cached exchange mode is turned back
ON. The user's profile in Outlook has not changed, nor has there been
any change on the Exchange 2003 server regarding the mailbox settings.

What happens with regard to the OST file? Does Outlook use the old OST
file and tries to sync it with the mailbox, possibly putting old items
stored in the OST file back into the mailbox? Or will Outlook create a
new PST file?

Thanks in advance.

-RAM
 
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B

Brian Tillman [MVP-Outlook]

I need to know the impact of re-enabling cached exchange mode and NOT
removing any old OST files. ....snip...
What happens with regard to the OST file? Does Outlook use the old OST
file and tries to sync it with the mailbox, possibly putting old items
stored in the OST file back into the mailbox? Or will Outlook create a
new PST file?

The times I've done this, Outlook has created a new OST for me, adding a
number to the end of the file name, like Outlook0.ost, Outlook1.ost, etc.
 
R

RAM

The times I've done this, Outlook has created a new OST for me, adding a
number to the end of the file name, like Outlook0.ost, Outlook1.ost, etc.

As a test, I turned off Cached mode on my Outlook 2007 for a day, then
turned it back on. No new OST file - looks like Outlook re-used the
existing one. (Interestingly, I checked the OST file before I turned
it back on, and it had a current timstamp on it, like Outlook was
still using it.)

We're also testing an Outlook 2003 machine - turned on cached mode
yesterday (had never been enabled on that machine before, b/c there
were no OST files), will turn it off midday today, then turn it on
again tomorrow. I'll post our results.

-RAM
 
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B

Brian Tillman [MVP-Outlook]

As a test, I turned off Cached mode on my Outlook 2007 for a day, then
turned it back on. No new OST file - looks like Outlook re-used the
existing one.

I thought about what I had done before when I saw what I described and
realized that I got a new OST when the mail profile was new but there was
already an OST of the default name in the folder. It wasn't due to turning
Cached Exchange mode off then on. Sorry for the misinformation.
 

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