Set or Reset Reconciliation Accounts

Hi,

I have some adjustment posting to be made to Asset Recon Account and know that we have to use OAMK to do that. However we cannot do that in live company code status and should be changed to status '2'--test or '3'--deactivate in "Activate Company Code" config. I have read in many discussions recommending using test status and trying to understand the implication of 2 and 3 and which is better. one of my previous consultants has used 3. Also what precautions should i take once the adjustment postings are done. I know that we have to reset it back to recon account, should i do this whole thing after hours as to make sure that no other user posts it to this particular recon account. can you recommend the best practices here. thank you

Shriya