Hi,
The maximum possible allowed in SQL Server is 12-31-9999 23:59:59.997 ,
CRM converts all input datetime into UTC and then store in database due to the day/ligh saving nad timezone changes the maximum allowed datetime value set for CRM is
12-30-9999 and there is not standard functionality available to change the maximum value criteria for CRM 2011 DateTime field unless you manually change the values into the CRM database (unsupported customization and highly unrecommended approch).
Update: if it is required then you may also consider using the Text field to store the date value 12/31/9999 in text format
Jehanzeb Javeed
http://worldofdynamics.blogspot.com
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