![Kevin Beaumont on Twitter: "A reminder that orgs should get in place and execute plans to get to a supported Exchange Cumulative Update AND apply the April Security Update, as people continue Kevin Beaumont on Twitter: "A reminder that orgs should get in place and execute plans to get to a supported Exchange Cumulative Update AND apply the April Security Update, as people continue](https://pbs.twimg.com/media/EzDXLc-WQAEZK9q.jpg)
Kevin Beaumont on Twitter: "A reminder that orgs should get in place and execute plans to get to a supported Exchange Cumulative Update AND apply the April Security Update, as people continue
🔮WZor👁️ on Twitter: "⚡️📝Released: July 13, 2021 Exchange Server Security Updates👉https://t.co/GP4ONau8Uw ✔️2019 CU10 SU1 #KB5004780👉https://t.co/9abgVQdYS6 ✔️2016 CU21 SU1 #KB5004779👉https://t.co/CoPU3YvNIn ✔️2013 CU23 SU1 #KB5004778 ...
![Error during Exchange 2013 CU upgrade from CU20 to CU22 – “The installation source for this product is not available. Verify that the source exists and that you can access it” Error during Exchange 2013 CU upgrade from CU20 to CU22 – “The installation source for this product is not available. Verify that the source exists and that you can access it”](https://anishjohnes.files.wordpress.com/2019/11/error-4.png?w=593)
Error during Exchange 2013 CU upgrade from CU20 to CU22 – “The installation source for this product is not available. Verify that the source exists and that you can access it”
![Exchange server 2013 recovery installation failure | [ERROR] The internal transport certificate for the local server was damaged or missing in Active Directory | Anish Sam Johnes Exchange server 2013 recovery installation failure | [ERROR] The internal transport certificate for the local server was damaged or missing in Active Directory | Anish Sam Johnes](https://anishjohnes.files.wordpress.com/2021/03/new1.png?w=666)