I nedd to create a diagram of the Management Groups in Azure, and I remembered a project that did something similar but with PowerShell: https://github.com/PowerShellToday/new-mgmgroupdiagram.
If you can access the Azure Portal, you can export the Management Group structure to a CSV file. To do this, follow these steps:
If you don't have access to the Azure Portal, you can ask your Azure administrator to export the Management Group structure for you.
You should see a diagram with the Management Groups and Subscriptions.
This is the common structure for the Management Groups in the Enterprise Scale Landing Zone, now Accelerator Landing Zone:
#label: %displayName%
#stylename: itemType
#styles: {"Management Group": "label;image=img/lib/azure2/general/Management_Groups.svg;whiteSpace=wrap;html=1;rounded=1; fillColor=%fill%;strokeColor=#6c8ebf;fillColor=#dae8fc;points=[[0.5,0,0,0,0],[0.5,1,0,0,0]];",\
#"Subscription": "label;image=img/lib/azure2/general/Subscriptions.svg;whiteSpace=wrap;html=1;rounded=1; fillColor=%fill%;strokeColor=#d6b656;fillColor=#fff2cc;points=[[0.5,0,0,0,0],[0.5,1,0,0,0]];imageWidth=26;"}
#
#
#namespace: csvimport-
#
#connect: {"from": "ParentId", "to": "displayName", "invert": true, "style": "curved=1;endArrow=blockThin;endFill=1;fontSize=11;edgeStyle=orthogonalEdgeStyle;"}
#
## Node width and height, and padding for autosize
#width: auto
#height: auto
#padding: -12
#
## ignore: id,image,fill,stroke,refs,manager
#
## Column to be renamed to link attribute (used as link).
## link: url
#
## Spacing between nodes, heirarchical levels and parallel connections.
#nodespacing: 40
#levelspacing: 100
#edgespacing: 40
#
## layout: auto
#layout: verticaltree
#
## ---- CSV below this line. First line are column names. ----
id,displayName,itemType,ParentId
1,Tenant Root Group,Management Group,
2,Intermediary Management Group,Management Group,Tenant Root Group
3,Decommissioned,Management Group,Intermediary Management Group
4,Landing Zones,Management Group,Intermediary Management Group
5,Platform,Management Group,Intermediary Management Group
6,Sandboxes,Management Group,Landing Zones
7,Corp,Management Group,Landing Zones
8,Online,Management Group,Landing Zones
9,Connectivity,Management Group,Platform
10,Identity,Management Group,Platform
11,Management,Management Group,Platform
12,subcr-1,Subscription,Decommissioned
13,subcr-2,Subscription,Sandboxes
14,subcr-3,Subscription,Corp
15,subcr-4,Subscription,Online
16,subcr-5,Subscription,Connectivity
17,subcr-6,Subscription,Identity
18,subcr-7,Subscription,Management
https://viewer.diagrams.net/?p=ex&tags=%7B%7D&highlight=0000ff&layers=1&nav=1&title=MGs.drawio#R7Zxbc5s4FMc%2FjR%2BbAQkEPK7dJHWn3XbW6exMX3ZkkLFakDxCvvXTr7jFxrZi1k0Wg5lxYnR0QfqfHxqOBB7AUbx5FHgx%2F8wDEg2AEWwG8P0AAGAgQ32llm1uMU0X5pZQ0KCw7QwT%2BosUxqJiuKQBSSoFJeeRpIuq0eeMEV9WbFgIvq4Wm%2FGoetYFDsmRYeLj6Nj6Nw3kvBwG8nYZHwgN58WpXeDkGTEuCxcjSeY44Os9E7wfwJHgXOZH8WZEolS9Upe83oMm97ljgjB5osK3hIgv0x%2BpJsCI8FQ5Jis0AHZAk0WEt3%2FimKhU3k7Z7HBLxq7x42mcwOHy%2B0dn9PCRvIOFz%2FYrZqWfCMMsPcFf6TCA8Sj4clE0KEn8tF0UBT9jpoSKCTso9TXr%2Fjgo%2B5YNKcI%2BmStHEbHvvKoMidyWLioGN6Rx7ksah0qFiE7Vf%2FxrKUgqSkgYEVjVfNh15Z%2BsI8ldsgpV9fVcdXmyUOdWbawVzso2l3Eqm6kOVVEWkKBIpSjRKBrxiIusF3aaTNWEw0QK%2FpPssiDyXTKdqZxqFRhg4s58ZV9wymQ2VnuoPsadcsrIqPzZqsLoOc88zFOftFOpfCsiJNloIdnX8pHwmEixVUWKCpYD7goituU1nCfXO%2FqB4ea2%2BR74dmHDhc%2FC57Z3TKqDwoFlco%2FS16fW0lA7ZpKImAQUZ0PXsXkJwS9cED3WDWINnQOsTegec%2B20g2tbw%2FV74vM4pklCOVMuvRjimtdHD3RzQJezcjlJ2%2BiIZtNrB81IQ%2FMnzALKFCLGd4Vz0uPcYZyhZ57nuSWzs6Ph%2BWuE5YyLuAe5wyB7rn0eZKsdILsakCdqYp7yze9MySfn9p7bBu8nAKxwCx3rmFvUDm49DbcjLn4jsuuRvTJkLWieRxa0AlnL0CD7hUWUkR7azkBre955aGE7oDW182y2FE9XVG4vR7d6u9wz2xyzjuN05d7AAhpmx4ESo%2Be1E7wexmBtnmN1G2%2F7TPbEtp1Y00Q1wq92rH9Zul23ZDn1xTvzFK%2BT5TTxBV1IytkpUk9tbLwxr%2FtdentWAzRFNjpmdTabAf8VWc0GXz7HANAr3dPWmG5bEofpdtZydsEl7B6slvXYXgu2wKrOuZYHWsutbg8t5xZewu1utaxH9lqQPVzyajOyum2yHFnrEmT3V8t6aK8FWmRYnYFWtyWWQ2tfAu3xalmP7rWg63hOZ9DV7Yrl6KJL0K0umvXYXgu2nmd0BVtbtzOWY%2Btcgu3h2lkP7rWAa5qu2yS5Ry9ZnGayGNcKR0tSog2qjPhLsXp2IGHBH%2BmrKCo5jbj%2F82lOWW5%2BSB2ZF5pxJovXX8ysUhCSSdEgF3LOQ85wdL%2BzFoKn5V6WW3WML4VPXhhS%2BYKHxCIk8qWC1mkHChJhdQ9T7cl%2FcEZN5UH3lLfqKm83qjy8YeVRo8pbN6y806jydveUR3WVdxtVHt2w8l6jyju3q3z%2BFF5jyrvdU96pq7wmLPiflPduWHnQpPLlrwPcpPKwUeU7GMPadZVvNIZFHYxh3brKNxrDog7GsF5d5RuNYVH3YtjylY3zyjcaw6LuxbDlewfnlW80hkXdi2HLp%2BfPK99oDIu6F8Naddfn7TeKYVVy90tVWd7eD37B%2B38B#%7B%22pageId%22%3A%22UGUHswWqf16rUITyRAQM%22%7D