Cannot combine files have premium

[chrisannw_57]

I cannot combine files, have premium and it keeps saying unable due to security 

[jane-e]

@chrisannw_57 

Are any of the files locked? Locked files cannot be combined. Please show the error message.

Jane

[Amal.]

Hi there

++ Adding to the discussion

With subscription to Adobe Acrobat Premium or Adobe Acrobat Pro DC, you can combine up to 12 files into a single PDF. You can also combine files from any integrated file location such as Dropbox and Drive.

Note the following limitations in combining files:

• You cannot combine files that are shared for review.
• You must log in to Adobe cloud storage.

For more information , please check the help article https://adobe.ly/44vKvrl

[creative explorer]

@chrisannw_57 as per @jane-e and @Amal. Adobe Acrobat Reader Mobile app does not have the feature to combine PDF files. This function is primarily available on the desktop versions of Adobe Acrobat Pro or Standard, which are different, more feature-rich applications than the mobile Reader.

The "security" message you're encountering likely isn't a setting within the Reader app itself that you can change. Instead, it often indicates that one or more of the PDF files you are trying to combine have security restrictions embedded in them that prevent modifications like combining with other documents. These restrictions are usually set by the creator of the PDF.

Therefore, to combine these files, you would typically need to use a desktop version of Adobe Acrobat Pro or Standard. If you have access to a computer with one of these programs, you might be able to open the individual files and check their security settings. In some cases, if you know the password or have the necessary permissions, you might be able to remove these restrictions and then combine the files.

If you don't know the password or don't know the person who created the file, there is a reason why the form is secured due to security. Yes, there are third-party websites that can unlock these files, but then again, you need to be very cautious about uploading sensitive documents to third-party websites as sensitive information can be stolen from you! It is absolutely possible for third-party websites to add a virus, trojan, or other malicious code to an "unlocked" PDF file that you download from them. When you open it, it could install malware in the background while appearing to be a normal document. This malware could then steal your personal information, banking details, or other sensitive data.

[jane-e]

@chrisannw_57 as per @jane-e and @Amal. Adobe Acrobat Reader Mobile app does not have the feature to combine PDF files.

By @creative explorer

The OP pays for the premium features of Adobe Acrobat Reader Mobile, which includes combining files.

Jane

[chrisannw_57]

Thanks for the reply

[intuitive_Noh]

I'm facing the same problem. Already subscribe the premium Acrobat but still cannot combine the files. Previously I can do the task without any problem. Really hope Acrobat Team to look into this issue.

[Amal.]

Hi there

Hope you are doing well, and thanks for reaching out. We are sorry to hear that you are experiencing issues while combining the PDF files.

As suggested earlier in the discussion, do any of your selected PDF files have any restrictions applied, or include digital signatures? If yes, such files can not be combined with other PDFs. Please try to remove any such files from the set of files you are trying to combine.

For testing purposes, try to combine different sets of  PDF files and see if that works.

If it is not the case of protected PDF files or digitally signed PDF files, and you continue to experience the same issue, please share a small video recording of the steps you are taking and the issue as it occurs, along with some test PDF files so that we can check this at our end.

Additionally, check for any pending or missing updates, try updating the Acrobat Reader Mobile app from the App/Play Store, and reboot the device once.

Let us know how it goes.

[intuitive_Noh]

Hi,

attached are the video & pdf sample that I've tried to combine.

[jane-e]

@intuitive_Noh 

Thank you for providing the info in the third of four issues in the post from Amal that you replied to. Can you please address the remaining three issues?

Jane

[intuitive_Noh]

Hi Jane, 

sorry I'm not understand what you're referring to. I only have one issue regarding combine files using Acrobat Premium.

[jane-e]

sorry I'm not understand what you're referring to. I only have one issue regarding combine files using Acrobat Premium.

By @intuitive_Noh

From Amal in the post you replied to. I added the numbers for clarity. You provided the video he asked for in number 3.  Please address 1, 2, and 4.

1

As suggested earlier in the discussion, do any of your selected PDF files have any restrictions applied, or include digital signatures? If yes, such files can not be combined with other PDFs. Please try to remove any such files from the set of files you are trying to combine.

2

For testing purposes, try to combine different sets of  PDF files and see if that works.

3

If it is not the case of protected PDF files or digitally signed PDF files, and you continue to experience the same issue, please share a small video recording of the steps you are taking and the issue as it occurs, along with some test PDF files so that we can check this at our end.

4

Additionally, check for any pending or missing updates, try updating the Acrobat Reader Mobile app from the App/Play Store, and reboot the device once.

Jane

[intuitive_Noh]

Hi Jane,

Sorry for the misunderstanding.

1.  No digital signature for the PDF.

2. Already tried with different sets of PDF files (since last week) but still the combine feature doesn't work.

4. No pending or missing updates and my device was rebooted.

Thank you.

[Amal.]

Hi there

Thank you for sharing the details, and we are sorry to hear that the issue still exists.

Have you tried downloading and saving the PDF files to your mobile device locally before combining them? If not, please do so and see if that helps.

I have tried to reproduce the issue on my end, and it's working fine. Would you mind sharing the version of iOS you are using? Also, try updating the iOS version and reboot the device once, and see if that helps.

You may also try to combine the PDFs on the Acrobat web here: https://adobe.ly/4k0O1PA and see if that works.

[intuitive_Noh]

Hi,

I've tried everything including combine files using web but it still not working.

Below are info of my devices:

1. iPad Air (4th generation)
iPadOS 18.5 (22F76)
Adobe Acrobat Reader: Version 25.04.01 (20250506.203323)

2. iPhone 13
iOS 18.5 (22F76)
Adobe Acrobat Reader: Version 25.04.01 (20250506.203323)

[Amal.]

Hi there

Thanks for sharing the version details. Also, please share a small video recording as requested earlier so we can get this checked with our development team.

[intuitive_Noh]

Attached is the video requested. Its a very frustrated situation. I think it's time to stop using the Acrobat Reader. Waste of my money!

[Amal.]

Hi there

Thanks for sharing the video recording, please give us some time to check it.

We will share the update as soon as we get more information.

Thanks for your understanding.

[Amal.]

Hi there 

Thanks for your patience, we have logged the ticket for this issue with our engineering team for detailed investigation and isolating the issue for the fix. 

We will share the update as soon as we get any information. 

[rajnikant_3820]

I can't combine the different files 

Please help me 

[S. S]

Hi @rajnikant_3820,

Hope you are doing well. Sorry for your experience with combining files on Acrobat Mobile.

As mentioned by Amal earlier, this has already been escalated to the engineering team, and they are working on a fix.

We request your kind understanding and patience while the team releases the fix.

Regards,
Souvik.