Exchange 2010 Update-MailboxDatabaseCopy -CatalogOnly

We have a couple of databases that have Failed Content Index State. If I run the following command via POwershell;
 
Update-MailboxDatabaseCopy -Identity database\exch01 -SourceServer exch02 -CatalogOnly
 
1) Are there any risks involved?
 
2) Can we lose data?
 
3) How long is it likely to take e.g. 100GB database?
 
Thank you
LVL 1
the_omnificAsked:
Who is Participating?
 
Manpreet SIngh KhatraSolutions Architect, Project LeadCommented:
1) Are there any risks involved? - I dont think so
2) Can we lose data? - Its just indexing data nothing to do with Mailbox.
3) How long is it likely to take e.g. 100GB database? - What is the current size on Active node of Catalog folder and what is the replication speed between servers ?

Prefer to take a Good Online backup after production hours and perform this activity as it might cause delays to the replication network during this process.

- Rancy
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Manpreet SIngh KhatraSolutions Architect, Project LeadCommented:
1) Are there any risks involved?  - No it will just move Catalog data from Active to Passive :)

2) Can we lose data? - No email data will be lost

3) How long is it likely to take e.g. 100GB database? - Database Catalog is approx 5% of database size but could vary :)

- Rancy
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the_omnificAuthor Commented:
Hi Thanks for your comments.
   
"No it will just move Catalog data from Active to Passive" can you please explain? It won't affect the source server at all?
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Manpreet SIngh KhatraSolutions Architect, Project LeadCommented:
I dont see a command with -CatalogOnly  ...... where did you get that from and what are you exactly trying to achieve ?

- Rancy
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the_omnificAuthor Commented:
When I run; GET-MAILBOXDATABASECOPYSTATUS -SERVER SERNAME
 
Content Index State is; Failed.
 
Running; Update-MailboxDatabaseCopy -Identity database\exch01 -SourceServer exch02 -CatalogOnly
 
Fixes that, right?
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the_omnificAuthor Commented:
Hi Rancy, I have been through all this. I just want to know; RE: CatalogOnly

1) Are there any risks involved?
 
2) Can we lose data?
 
3) How long is it likely to take e.g. 100GB database?
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