Flash Player MSIs are available for enterprise distribution via Flash Player distribution license (free for the vast majority of use cases). To request a distribution license please go to Adobe Flash Player Distribution | Adobe
The majority of the requests are processed almost immediately, but can take up to 2-3 days to process. The email comes from email@example.com and contains an encrypted PDF attachment. Spam filters and/or perimeter email scanners have been known to block the email.
If, after 2-3 days, you do not receive the email, please check your spam folder and/or with your quarantine folder to see if it's there. If it's not, private message me the Adobe ID/email address used to request the distribution license and I'll follow-up with the licensing team.