hi…
when i do symmetrize the left hand bones to right side,
in edit pose its looking fine, but in pose mode joints have
moved from its alignment !? can you please guide how to
get it right…
thank you
Normally when bones look different in Pose/Edit Moden, then it’*s because constraints are moving bones from their original rest pose.
In your case: it’s the lack of constraints.
Look closely: your IK bone for the arm is missing. If I had to guess I think the rest of your IK chain as well.
Make sure all your bones have the correct naming conventions before you symmetrize. Bones without .L/.R or _R/_L don’tget symmetrized. Then afterwards make sure all your constraints symmetrized as well and didn’t keep their old target
Hope this helps, good luck! 
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