The Malaysia Union Mission of Seventh-day Adventists (MAUM) was a territory under the former Southeast Asia Union Mission (SAUM), one of nine unions of the Southern Asia-Pacific Division (SSD). The Southeast Asia Union Mission was organized in 1917 and reorganized in 1929, with its headquarters located at 798 Thomson Road, Singapore. Its territory included seven countries: Brunei Darussalam, Vietnam, Lao People’s Democratic Republic, Malaysia, Singapore, and the kingdoms of Cambodia and Thailand.
On November 5, 2019, Southern Asia-Pacific Division’s Executive Committee voted to divide the Southeast Asia Union Mission into two new unions and an attached field with the transfer process to be completed in December 2021.
Finally, it was approved to form the following unions: the Southeastern Asia Union Mission (SEUM), the Malaysian Union Mission (MAUM), and the reassignment of the Singapore Adventist Conference (SAC).
On the 5th of December 2022, the Malaysia Union Mission of Seventh-day Adventist held its inauguration ceremony in Seremban 2, Negeri Sembilan, Malaysia.