OB52 month end closing issue authorisation group issue

Dear viewers, I had some issues in closing the year earlier this year. I thought it is a good idea to share. In OB52 screen, there are 9 fields after the accounts. PROBLEM1: There were many access issues for many period end transactions all over the company. RESOLUTION: I found out that someone who has access to OB52 had introduced Authorization group 01 for acct type "S", which restricted the access of all the transactions. I made this field(Authorization group) blank as there are only two people who has access to OB52 in the whole company. I found that there is no reason to maintain this field. This field is to be maintained only if you want to segregate the authorization according to "account types". Basis team has to maintain authorization groups assignment in the background. PROBLEM 2: Even after closing the previous period, since the Second period from and to are opened from couple of years back, any user can post in the previous periods. One user posted a journal it in the previous year because of this scenario. Resolution: Second period(from and to) were made restricted to 13 and 16th period of previous year for special period postings only. After few days, business came to me and asked to leave the second (from and to) periods blank. I explained them saying that the first (from and to) periods can be the only one that can be maintained but it is recommended as a best practice to maintain the second(from and to) period as 13 to 16 of previous period.