The access log does not require any configuration for soft delete.

DELETE (soft-delete) operations
The access log displays the following.
[14/May/2012:09:40:16.942 -0500] DELETE RESULT conn=18 op=1 msgID=2
dn="uid=user.1,ou=People,dc=example,dc=com" resultCode=0 etime=30.367 
softDeleteEntryDN="entryUUID=4e9b7847-edcb-3791-b11b-7505f4a55af4+uid=user.1,
ou=People,dc=example,dc=com"
SEARCH operations for soft-deleted entries
The access log displays the following.
[14/May/2012:09:40:52.320 -0500] SEARCH RESULT conn=19 op=1 msgID=2 
base="dc=example,dc=com" scope=2 filter="(objectclass=ds-soft-delete-entry)" 
attrs="ALL" resultCode=0 etime=1.631 entriesReturned=1
MODIFY operations of soft-deleted entries
The access log displays the following.
[14/May/2012:09:42:43.679 -0500] MODIFY RESULT conn=20 op=1 msgID=1
dn="entryUUID=4e9b7847-edcb-3791-b11b-7505f4a55af4+uid=user.1,ou=People,dc=exam-
ple,dc=com" resultCode=0 etime=2.639 changeToSoftDeletedEntry=true
ADD (soft-undelete) operations
The access log displays the following.
[14/May/2012:09:58:16.728 -0500] ADD RESULT conn=25 op=1 msgID=1
dn="uid=user.0,ou=People,dc=example,dc=com" resultCode=0 etime=22.700 
undeleteFromDN="entryUUID=ad55a34a-763f-358f-93f9-da86f9ecd9e4+uid=user.0,
ou=People,dc=example,dc=com"