The time should be 10 min unless it's something in the Nokia software...
Assuming it's 10 min and the Outlook warning - Do you have the newest
version of the sync software? Properly written, the sync software shouldn't
give you that warning at all. The warning was added about 5 years ago and
most vendors updated their software soon after.

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Diane Poremsky [MVP - Outlook]
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> When I try to sync my outlook and my phone, outlook only gives me the
> option
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>
> http://www.microsoft.com/office/community/en-us/default.mspx?mid=dca2f2b5-5c88-4
d89-8e55-13c24edbe731&dg=microsoft.public.outlook.calendaring