"ceased to be active" is correct and usable in written English.
You can use it when you want to express that something has stopped operating or behaving in the way it was before. For example, "The organization ceased to be active after the financial crisis."
Howard never ceased to be active on behalf of the schools.
After a number of other minor border incidents and raids, the Lodges ceased to be active in the 1840s.
The last fumaroles ceased to be active in 1970, and the surface hydrothermal spots currently existing are three low-temperature thermal springs located on the volcano flanks.
By the end of 1981, the previous contenders, who had been heavily presented in the media, were all gone; two were given ambassadorships, two ceased to be active in politics, and one continued as an advisor to the government.
IN PRACTICAL terms, Russia has ceased to be an active enemy of the West.
Once powerful, the Privy Council has long ceased to be an active body, having lost most of its judicial and political functions since the middle of the 17th century.
He is a central figure in any history of 20th-century music, and in his lifetime he made creative contact with composers as historically and stylistically diverse as Charles Ives, a great maverick of early 20th-century music and his most important tutor, Igor Stravinsky, Leonard Bernstein, Pierre Boulez and John Cage.Yet Carter never ceased to be an active part of the musical present.
It ceased to be an active gristmill, but was in functioning order.
Casing the unit's colors was a tradition formally signifying its inactivation and, for all official purposes, the brigade had ceased to be an active Army unit.
Shackleton observed that Vincent had collapsed and ceased to be an active member of the crew, McCarthy was "weak, but happy", McNish was weakening but still showing "grit and spirit".
Cross remained in the legislature for several more years, but took no active role in its proceedings, and soon ceased to be regarded as a major force.
