共享后, pincipalobjectaccess会添加一条记录, 共享的权限由AccessRightsMask这个数值决定(Read = 1, Write = 2, Append = 4, AppendTo = 16, Create = 16,Delete = 65536,Share = 262144, Assign = 524288. 所以如果数值为3,权限则为1+2,也就是read/write:数值为7,权限就是1+2+4等等) 取消了共享, 记录不会被删除,但AccessRightsMa…