Источник:
http://axaptacorner.blogspot.com/201...use-table.html
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“Not enough rights to use table 'Signature log' (SIGSignatureLog).”
(Some time this problem is occurred when we want to see record info of any record)
SOLUTION: After installing AX5 SP1, it creates a new configuration key which it leaves unticked. go into Administration > Setup > System > Confiugration and tick the Electronic Signature tick box
good luck!!!!!! 
Источник:
http://axaptacorner.blogspot.com/201...use-table.html