Back in October 2020 Microsoft announced that commercial customers wouldn’t be able to buy through the Open License Program after 31 December, 2021 (http://bit.ly/393LlhZ). A recent article confirms that this will also apply to government, education and nonprofit customers in the same timeframe.
These customers will be able to buy perpetual licences for the traditional on-premises products in CSP in July 2021, and there will be additional Open Value options from March 2021 for nonprofit and education customers to buy licences with SA or to renew SA.
Find the article here: http://bit.ly/39693dH, where it might be worth perusing the FAQs at the bottom of the page.