March 2021 CU for SharePoint Server 2016 is available for download

15 Comments

1. 

   mtasci
   On 24. March 2021 Permalink

   Hi Stefan, does this CU include updates which released with past CUs for SP 2016?

   Reply
   1. 

      Stefan Goßner
      On 24. March 2021 Permalink

      Yes – otherwise it would not be a CU.

      Reply
2. 

   Thina
   On 30. March 2021 Permalink

   Any known issue in this patch since i am going to patch the PROD servers. Please let me know if any

   Reply
   1. 

      stefano2203
      On 7. April 2021 Permalink

      Hi Tina, have you applied the patch in PROD in the meantime? What are your experiences so far?

      Reply
3. 

   stefano2203
   On 7. April 2021 Permalink

   Have you applied the patch in PROD in the meantime? What are your experiences so far?

   Reply
4. 

   Nischay JAiswal
   On 10. May 2021 Permalink

   can we dismount/mount all content databases during in sharepoint server 2016 pre-post CU installation. is it fine to perform the step and what will be the criticality if we do so ?

   Reply
   1. 

      Stefan Goßner
      On 10. May 2021 Permalink

      Hi Nischay,
      you can certainly do this but I’m not sure what the benefit would be as it would cause a downtime which can be avoided otherwise using zero-downtime patching functionality.
      Cheers,
      Stefan

      Reply
5. 

   Subhash
   On 10. June 2021 Permalink

   Hi Stephen,

   We are planning to Install March 2021 CU in our SharePoint 2016 servers and we also want to patch for this vulnerability.
   https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-31963

   Can you please let us know if the fix for this vulnerability is included in March 2021 CU or do we need to install separate hot fix.
   If its not included then how to install both together March 2021 CU+ Host fix.

   Reply
   1. 

      Stefan Goßner
      On 10. June 2021 Permalink

      Hi Subhash,
      this is fixed in June 2021 CU.
      So rather than installing March CU you would need to install June CU.
      Cheers,
      Stefan

      Reply
      1. 

         Subhash
         On 11. June 2021 Permalink

         Hi Stephen,

         We have October 2020 CU installed in our SharePoint 2016 servers.
         if we want to install the hot fix for CVE-2021-31963 vulnerability then do we need to run configuration wizard after installing the hot fix from below URL
         https://www.microsoft.com/en-us/download/details.aspx?id=103207

         Reply
         1. 

            Stefan Goßner
            On 11. June 2021 Permalink

            Of course. All SharePoint fixes require the config wizzard.
            But you should not install the fix you listed without installing the language dependent fixes from June which also include security fixes:
            https://blog.stefan-gossner.com/2021/06/09/june-2021-cu-for-sharepoint-server-2016-is-available-for-download/

            Reply
            1. 

               Subhash
               On 11. June 2021 Permalink

               Hi Stephen,

               So in order to install the hot fix for this Vulnerability then we need to install KB 5001946 & KB 5001922 which also include previous update as well and then our farm version will change to June 2021.

               Is it possible to install only security update for this fix and not complete June 2021 CU.

            2. 

               Stefan Goßner
               On 11. June 2021 Permalink

               Hi Subhash,
               SharePoint fixes are cumulative and always include all security and non-security fixes up to this point.
               Cheers,
               Stefan

6. 

   Rui Sousa
   On 17. August 2021 Permalink

   Hello Stefan,

   Is there an order to install the Language independent and the Language dependent fixes or it doesn’t matter?

   The configuration wizard is only executed after installing both fixes correct?

   Thanks!

   Reply
   1. 

      Stefan Goßner
      On 17. August 2021 Permalink

      Hi Rui,
      there is no reqired sequence.
      PSConfig is only required once.
      Cheers,
      Stefan

      Reply