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rename file attachment with timestamp

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Posted on by Veblitz

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I need to check if email file attachment name already exists in document library then i need to append time stamp to the file and then create new file.

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Building flows

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CU08111613-0 14 on at

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Start your flow with a trigger that detects a new email. Use the trigger "When a new email arrives" to initiate the flow.

Use the "Get attachments" action to retrieve the attachments from the email.

Use an "Apply to Each" loop to iterate through all the attachments.

Within the Apply to Each loop, use the "Get files (properties only)"

Set a Filter Query to check for files with the same name ( FileLeafRef eq 'AttachmentName')
Replace 'AttachmentName' with the dynamic content that represents the attachment name

Add a Condition after the "Get files (properties only)" action
Check if the length of the output from "Get files (properties only)" is greater than zero length(body('Get_files_(properties_only)?')['value'])

If True (file exists), proceed to the next step to rename the file

If the file already exists, create a Compose action to generate the new file name with a timestamp
concat(triggerOutputs()?['headers']['x-ms-file-name-encoded'], '_', utcNow(), '.ext')
Replace .ext with the appropriate file extension

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Nived_Nambiar 18,136 Super User 2026 Season 1 on at

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Hi,

You can modify the code like below

After validating condition whether attachment name does not contain png, then in yes branch, use get files to check whether file name with same as attachment name exists within given folder

Use get attachment to get attachment content like below

Now use a condition action to check whether there is output from get files action, if yes - it means file exists , else not

Expression:

length(outputs('Get_files_(properties_only)')?['body/value'])

if the above condition is true- it means no such file exists so flow can proceed to create file same as attachment name

Else if condition is false- it will create the file with timestamp appended in file name like below

Expression used:

concat(split(outputs('Get_Attachment_(V2)')?['body/name'],'.')?[0],formatDateTime(utcNow(),'ddMMyyyhhmmss'),'.',split(outputs('Get_Attachment_(V2)')?['body/name'],'.')?[1])

Hope it helps !

Mark it as solution if it resolves your query !

Thanks & Regards,

Nived N

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Veblitz 2,249 on at

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Files are getting stored outside the folder for the first time and for the same file its appending timestamp but its getting stored inside the folder.

Everytime for new file its not copied into folder path, kindly help

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Nived_Nambiar 18,136 Super User 2026 Season 1 on at

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Hi,

you need to specify the folder path where file need to be created/saved

That would helps !

Thanks & Regards,

Nived N

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