From time to time our Exchange 2010 looses some adresses from public folder

Hi,

from time to time an exchange Server 2010 (sbs2011) looses some (not all) adresses from a public folder.
The users say that they are not the reason and that they do everything right...
I just take the right to delete from everybody away to test it.
Do anybody out htere have any idea what else could make the exchange to kill their adresses ? How can i read what had happened ? It happens after a few days.
All users use Outlook2013. Everything is patched.

Thanks in advance

loosain
loosainAsked:
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Simon Butler (Sembee)ConsultantCommented:
Can you be clear exactly what you mean?
Do you have a public folder with contacts in it, and those contacts are being lost?
Or do you mean something else?

The only reason that Exchange would remove content on its own is if a maximum age was set on the properties of the folder. Otherwise it is almost always user error, either on purpose or by accident - mouse slip for example.

Simon.
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loosainAuthor Commented:
Yes, we have a piblic folder with about 1000 contacts.
from time to time a few contacts are gone. We talk about 100-400 missing contacts.  But always this public folder isnt completly empty. There is no age or archiving enabled.
i too think that this is a user cause. But the customers tells ne that this is impossible.
now i am searching for a way to proof a user error.
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Zacharia KurianAdministrator- Data Center & NetworkCommented:
You may have to check the permissions you have given to the contacts in the public folder.

If any one who has "Owner" rights can modify/delete/add to these contact folder.

Do you have a backup of your exchange? if so why don't you restore them and change the rights of the user or monitor the rights of the users?
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Zacharia KurianAdministrator- Data Center & NetworkCommented:
also it worth trying the following;

http://blog.ronnypot.nl/?p=169
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loosainAuthor Commented:
The link isn´t accessable.

What do you mean by "monitor the rights". Is there anything that i can monitor, what exactly happens in this folder (e.g. user a deleted contact xxx or user a moved cobntact to local adresslist ).

Thanks
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loosainAuthor Commented:
ah, now the link works.
i alreaydy looked for deleted items, but none was found.
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Zacharia KurianAdministrator- Data Center & NetworkCommented:
The best option for you is to take backup of your exchange and then restore the contact from a previous backup, where you had most of the contacts
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Simon Butler (Sembee)ConsultantCommented:
Recover deleted items on the folder is usually only available from the user who deleted the content.
Ultimately there is little you can do about this as it is a user issue rather than a technical issue.

From a technical point of view, the only thing you can do is remove the permissions from the users to delete content. However that will almost certainly mean the data becomes out of date very quickly because the users cannot update it.

Ultimately, you are using Exchange as a CRM, which it is not designed to do.

Simon.
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loosainAuthor Commented:
Yes i know that this is looking more like a crm than a outlook scenario. but the customer didnt want to spent money to a crm i offered him in addition...
We took the right of deleting from everybody and now we wait 4 weeks to hopefully nothing happens to the contacts...
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loosainAuthor Commented:
After taking away the right to delete, no more adresses where deleted for now 40 days... So the customer have to belive that one of his people is killing adresses...
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