An Azure service that is used to provision Windows and Linux virtual machines.
there are some limitations in availability/capacity of different VM series.
The following VM series are affected by these capacity growth restrictions:
| VM category | Impacted VM series |
|---|---|
| Compute optimized | F, Fs, Fsv2 |
| Compute optimized | F, Fs, Fsv2 |
| General purpose | D, Ds, Dv2, Dsv2, Dv3, Dsv3, Dv4, Dsv4, Ddv4, Ddsv4, Dav4, Dasv4, B, Bs, Av2, Amv2 |
| Memory optimized | Ev3, Esv3, Ev4, Esv4, Edv4, Edsv4, Eav4, Easv4, G, Gs |
| Storage optimized | Ls, Lsv2 |
The recommendation is to use the latest VM series like v5, v6 and v7.
Source: Previous-generation VM size series capacity growth restrictions and migration guidance
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Regards
Andreas Baumgarten