Conversation so far:
what was a reform that was made related to umar?
While under his leadership, the empire expanded and he also began to build a political structure that would hold together the vast empire.
were there any other reforms?
together the vast empire.
He undertook many administrative reforms and closely oversaw public policy.
what other reforms did he make?
He established an advanced administration for the newly conquered lands, including several new ministries and bureaucracies, and ordered a census of all the Muslim territories.
was there another reform?
he extended and renovated the Masjid al-Haram (Grand Mosque) in Mecca and Al-Masjid al-Nabawi (Mosque of the Prophet) in Medina.
was there any opposition to any of his reforms?
CANNOTANSWER.

Question: were there any other reforms not yet mentioned?
Self-contained rewrite: were there any other reforms other than establishing advanced administration for newly conquered lands, adding several new ministries and bureaucracies and ordering a census for all Muslim territories?