Hi,
I added to my email signature at work the rainbow infinity sign that says Autism Awareness and underneath that, I wrote abe clear and concise please.
Am email has been sent to everyone saying we cannot have any banners etc on the email signatures. I asked my manager if mine was ok as it tells people how I need my communication and she said no, I cant have it as its a business directive.
This is what it looked like below. Is there anything I can do or suggest?
I love the infinity symbol / Autism Awareness and the "Be clear and concise please" text.
While I get that businesses want to dictate the style of email signatures, there most definitely should be room for adding in information about communication needs / neurodiversity, etc etc.
It raises awareness, promotes a culture of inclusion and acceptance, and - as your customer has clearly commented - makes others feel at ease.
I very strongly feel it should be encouraged! That said, you have done the right thing by challenging and asking for guidance from HR. Perhaps the company could design a graphic which can be used, which is in line with the company image and ethos? By raising it to HR and explaining to managers why you feel it should be included in your email signature, that can only help your cause - and show them that adding to your signature is not simply an act of defying the company directive.
Let us know how you get on, I'd love to see your HR's response to the email you sent them. 
What about discussing with HR the suggestion of using a more nationally recognised scheme such as the signature image files from the Sunflower Hidden Disabilities initiative (there is one with a green background for lanyard wearers and another one with a white background for lanyard supporters). That raises awareness and highlights some consideration / support is appropriate - it makes the point without being quite so much of a signature personalisation as your organisation can vet, virus-check, approve and install the 2 image options on the intranet etc. for colleagues to select for inclusion in their email signature.
(Some people might worry the the rainbow themed images might (irrationally) encourage some anti-LGBTQIA+ bigots (rainbow pride etc.) - to be promoted into: unwelcome poor behaviour).
