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Disappearing calendar items in a shared Public Folder company calendar

AshfordTC
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Several employees have noticed that calendar items disappear after being posted.  Specifically, we use a company-wide calendar, which is a Public Folder hosted on Microsoft Exchange Server 2010 SP1, and the clients are typically Outlook 2007, Outlook 2010, or Outlook Web Access.  In each case, an item is posted, such as vacation time, and then subsequently disappears.  Any ideas?  Thanks very much.

Tim
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Occam's razor requires that I ask whether users have full permissions to said calendar and may be deleting items that don't pertain to them not realizing that it makes the change globally...

Author

Commented:
Good question.  All the users in question have the rights of Editor, which technically gives them the ability to delete their own, and other users', posts.  But the four or five users that have come to me with this problem are among the most tech savvy people I know, and so I don't initially expect that it is "user error".  Thanks for responding so promptly.
Manpreet SIngh KhatraSolutions Architect, Project Lead
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Top Expert 2013

Commented:
Please check if this isnt the issue.

When dealing with Public Folder age limits, there are three settings that we need to be concerned with:

Age limit for all folders in the public folder database (days), which equates to the ItemRetentionPeriod parameter specified on the Public Folder Database
Use database age defaults, which equates to the UseDatabaseAgeDefaults parameter specified on the individual folder.
Age limit for replicas (days), which equates to the AgeLimit parameter also specified on the individual folder.

- Rancy

Author

Commented:
Exchange_Geek and Rancy, thanks for the helpful comments.  I went into both the Exchange Management Console, as well as PowerShell, and to the best of my ability either verified that age retention was set to unlimited, or ran commands per TechNet to insure that this was so.  Nothing appeared to have been out of order in this respect, but we will have to see.  Could there be anything else to check as well?
Manpreet SIngh KhatraSolutions Architect, Project Lead
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Top Expert 2013

Commented:
If its happening with one PF than very strange as no policy will just apply on that PF apart froma ny customization on it in someway ...... what best we can do is rename it to PFName_OLD, give some time for replication and then create a new PF with the same name and move data and then monitor.

- Rancy

Author

Commented:
Rancy, I appreciate these thoughts.  It is not only strange that it happens to only one of our several PF's, but also that in a folder which holds thousands of calendar items, only a few here and there disappear.  Obviously my first thought had been user error, but again, some of the users in question are very savvy and have had multiple issues.  So I think the idea of renaming, replicating, etc. is a good one.  We will try this.
Solutions Architect, Project Lead
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Top Expert 2013
Commented:
Thats getting more strange ... Ideally PF without and specific configuration or settings wouldnt delete some data here&there So ..........

Please share your feedback once your done with the steps :)

- Rancy

Author

Commented:
I am hoping to try your suggestion tomorrow.

Author

Commented:
My consultant had to be out today and so we will try to rename the PF on Monday.
The issue with mails getting disappear from public folder was from the age limit settings on the public folder settings. Exchange 2007 sp2 seems to have an issue with age limit settings.
 
If you select the Age limit for replicas (days) option instead of the Use database age defaults option for the local replica age, the age limit works as expected. However, after you select the Age limit for replicas option, you cannot cancel the selection. This remains true even if you later try to select the Use database age defaults option.
http://kbalertz.com/969230/function-public-folder-expected-Exchange-Server-environment.aspx

is this what you are facing - I doubt it, but was researching on your issue and found this note at link

Regards,
Exchange_Geek

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Commented:
I apologize for letting this thread grow stale.  I am eager to respect the time and attention that experts have given to this issue so far.  I need my consultant to implement some of the changes suggested, and he is going to be unavailable for another few weeks.  So we will have to live with this issue, and I will update here as soon as I have more info.  Again, thanks to those who have weighed in.
Your most wlcm :

You might want to award us if you feel we helped you and close the thread, open a new one when you want referencing this one.

Regards,
Exchange_Geek
Manpreet SIngh KhatraSolutions Architect, Project Lead
CERTIFIED EXPERT
Top Expert 2013

Commented:
Cool ... no issues :)

- Rancy