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exchange 2007 sp1 activesync refresh interval default

snowdog_2112
snowdog_2112 asked
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According to everything I've seen, the default for "Refresh interval (hours)" in an Exchange 2007 Activesync mailbox policy is "unlimited".

I can't find anything that describes what "unlimited" means in this context.  There is a solved question here on EE about it, but the link doesn't actually describe what "unlimited" hours means.  Never?  Always?  Constantly?

(dk)
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Commented:
Based on various articles, I believe that it means it never seeks to update the policy from the server. When you define the policy, you set a number of minutes/hours to sync to the server, and the default policy does not have this option checked. Therefore, it seams reasonable to believe that unlimited = never, given the relaxed nature of the rest of the EAS default settings. I am still looking around to confirm this...
Expert of the Quarter 2009
Expert of the Year 2009

Commented:
The problem is that everyone has simply repeated the same thing that Microsoft have stated - which is the explanation as to what it does (defines the time that the device looks for a new policy from the server) without actually defining the unlimited part. It is an odd word to use, but I have understood it to mean the same as above - ie that once the policy has been set the device does not look for a new policy again.

I haven't found anything to confirm this - even on the Technet documentation.

-M

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Commented:
(I noticed that everyone seems to be copy/pasting the official MS text, without further explanation)

So...does that mean it gets the default policy once, and then never refreshes?

Does a change in the policy on the server side force it to be pushed?

I'm just trying to figure out how the default policy - and subsequent changes to that policy -- are going to get to the mobile devices.

Thanks!
Expert of the Quarter 2009
Expert of the Year 2009
Commented:
A new policy will be pushed out in my experience. However if you simply change the existing then that change will not be picked up if the setting is set to Unlimited.
Set it for every 24 hours at the point of deployment and then any changes to the existing will take effect within that time period.

-M

Author

Commented:
Waiting to hear from my customer as to whether setting a value other than "unlimited" results in the new policy.

Still not sure how you can say "unlimited" for a measure of time... "infinite", "never", "no defined" I can see ...but "unlimited"?

Commented:
that's Microsoft for you :-)

Commented:
So...does that mean it gets the default policy once, and then never refreshes?

I answered that in my first post - gets it once, then never checks again.. but anyway

Author

Commented:
I wanted to verify that is what you meant - that it gets it once, then never refreshes.  I have it set to a number and that appears to be working - with one caveat: only the mail sync'd since the change is staying on the mobile devices, it doesn't go back and pull all mail by changing the "days of mail" (or whatever that one is).

So, you are indeed correct, and hopefully anyone else wondering what "unlimited" means, I would offer:

- "unlimited" means it gets the policy once, and never updates, even if a change (other than changing the refresh interval) is made at the server.
- Set the refresh interval, then change your other policy settings.
- if you want to increase the number of days of mail to sync to "all", you'll need to delete and recreate the connection on the mobile device, other wise it will sync new items and just not delete the older items -- it won't go back and pull older items,

Thanks again for the help.

Author

Commented:
tntmax suggested this in the first post, but it was not a definite, so I was in the same position I was when I asked the question, and I was looking for solid confirmation.  Hope that makes sense.  Thanks all!